Please answer the following question: Information:  - The T - 90 is a Russian third - generation main battle tank and represents a moderate evolution of the T - 72B , incorporating many features of the T - 80U ( it was originally called the T - 72BU , later renamed to T - 90 ) . It is currently the most advanced tank in service with the Russian Ground Forces and Naval Infantry . Although derived from the T - 72 , the T - 90 uses a 125 mm 2A46 smoothbore main gun , the 1A45T fire - control system , an uprated engine , and thermal sights . Standard protective measures include a blend of steel , composite armour , smoke dischargers , Kontakt - 5 explosive - reactive armour , laser warning receivers , Nakidka camouflage and the Shtora infrared ATGM jamming system . The EMT - 7 electromagnetic pulse ( EMP ) creator has been used in testing but not fitted to T - 90s in active service . It was designed and built by Uralvagonzavod , in Nizhny Tagil , Russia . Since 2011 , the Russian armed forces have ceased any further orders for the T - 90 , and are instead anticipating the development of the T - 14 Armata that is expected to enter service in 2016 .  - Sverdlovsk Oblast ("Sverdlovskaya oblast") is a federal subject (an oblast) of Russia located in the Urals Federal District. Its administrative center is the city of Yekaterinburg, formerly known as Sverdlovsk. Its population is 4,297,747 (according to the 2010 Census).  - The Ground Forces of the Russian Federation are the land forces of the Armed Forces of the Russian Federation, formed from parts of the collapsing Soviet Army in 1992. The formation of these forces posed economic challenges after the dissolution of the Soviet Union, and required reforms to professionalize the force during the transition.  - Asia is Earth's largest and most populous continent, located primarily in the eastern and northern hemispheres and sharing the continental landmass of Eurasia with the continent of Europe. Asia covers an area of , about 30% of Earth's total land area and 8.7% of the Earth's total surface area. The continent, which has long been home to the majority of the human population, was the site of many of the first civilizations. Asia is notable for not only its overall large size and population, but also dense and large settlements as well as vast barely populated regions within the continent of 4.4 billion people.  - World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the world's nationsincluding all of the great powerseventually forming two opposing military alliances: the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. In a state of "total war", the major participants threw their entire economic, industrial, and scientific capabilities behind the war effort, erasing the distinction between civilian and military resources. Marked by mass deaths of civilians, including the Holocaust (in which approximately 11 million people were killed) and the strategic bombing of industrial and population centres (in which approximately one million were killed, and which included the atomic bombings of Hiroshima and Nagasaki), it resulted in an estimated 50 million to 85 million fatalities. These made World War II the deadliest conflict in human history.  - The T-84 is a Ukrainian main battle tank, a development of the Soviet T-80 main battle tank. It was first built in 1994 and entered service in the Ukrainian Armed Forces in 1999. The T-84 is based on the diesel-engined T-80 version, the T-80UD. Its high-performance opposed-piston engine makes it one of the fastest MBTs in the world, with a power-to-weight ratio of about 26 horsepower per tonne (19 kW/t). The T-84 Oplot is an advanced version incorporating an armoured ammunition compartment in a new turret bustle; ten of these entered Ukrainian service in 2001. The T-84-120 Yatagan is a prototype model intended for export, mounting a 120 mm gun capable of firing standard NATO ammunition and guided missiles.  - The Soviet Army is the name given to the main land-based branch of the Soviet Armed Forces between February 1946 and December 1991, when it was replaced with the Russian Ground Forces, although it was not taken fully out of service until 25 December 1993. Until 25 February 1946, it was known as the Red Army, established by decree on 15 (28) January 1918 "to protect the population, territorial integrity and civil liberties in the territory of the Soviet state." It had 2.4 million men under its service during the Cold War.  - Shtora ("curtain") is an electro-optical active protection system or suite for tanks, designed to disrupt the laser target designation and rangefinders of incoming anti-tank guided missiles (ATGMs). The system is mounted on the Russian T-80 and T-90 series tanks, the Ukrainian T-84. The existence of "Shtora" was revealed in 1980 by Adolf Tolkachev.  - The T-80 is a third-generation main battle tank (MBT) designed and manufactured in the Soviet Union. A development of the T-64, it entered service in 1976. The T-80U was last produced in a factory in Omsk, Russia, while the T-80UD and further-developed T-84 continue to be produced in Ukraine. The T-80 and its variants are in service in Belarus, Cyprus, Egypt, Kazakhstan, Pakistan, Russia, South Korea, and Ukraine. The chief designer of the T-80 was the Russian engineer Nikolay Popov.  - Nizhny Tagil is a city in Sverdlovsk Oblast, Russia, located east of the virtual border between Europe and Asia. Population:   - The Soviet Union, officially the Union of Soviet Socialist Republics (USSR " ) was a socialist state in Eurasia that existed from 1922 to 1991. A union of multiple subnational republics, its government and economy were highly centralized. The Soviet Union was a one-party federation, governed by the Communist Party with Moscow as its capital.  - A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation". The first laser was built in 1960 by Theodore H. Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light "coherently". Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows a laser beam to stay narrow over great distances (collimation), enabling applications such as laser pointers. Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum, i.e., they can emit a single color of light. Temporal coherence can be used to produce pulses of light as short as a femtosecond.  - Adolf Georgievich Tolkachev (1927 in Aktyubinsk, Kazakhstan  September 24, 1986) was a Soviet Union electronics engineer who provided key documents to the United States Central Intelligence Agency (CIA) between 1979 and 1985. Working at the Soviet radar design house Phazotron as one of the chief designers, Tolkachev gave the CIA complete information about such projects as the R-23, R-24, R-33, R-27, and R-60, S-300; fighter-interceptor aircraft radars used on the MiG-29, MiG-31, and Su-27; and other avionics. Among the equipment compromised by Tolkachev was the passive phased array radar used by the MiG-31 Foxhound fighter, which the U.S. considered the most advanced airborne radar. He was executed as a spy in 1986.  - Russia (from the  Rus'), also officially known as the Russian Federation, is a country in Eurasia. At , Russia is the largest country in the world by surface area, covering more than one-eighth of the Earth's inhabited land area, and the ninth most populous, with over 140 million people at the end of March 2016. The European western part of the country is much more populated and urbanised than the eastern, about 77% of the population live in European Russia. Russia's capital Moscow is one of the largest cities in the world, other major urban centers include Saint Petersburg, Novosibirsk, Yekaterinburg, Nizhny Novgorod and Samara.  - The T-72 is a Soviet second-generation main battle tank that entered production in 1971. About 20,000 T-72 tanks were built, making it one of the most widely produced postWorld War II tanks, second only to the T-54/55 family. The T-72 was widely exported and saw service in 40 countries and in numerous conflicts. Improved variants are still being built for export customers.    After reading the paragraphs above, we are interested in knowing the entity with which 't-90' exhibits the relationship of 'service entry'. Find the answer from the choices below.  Choices: - 1922  - 1927  - 1939  - 1945  - 1946  - 1960  - 1971  - 1976  - 1979  - 1980  - 1985  - 1986  - 1991  - 1992  - 1994  - 1999  - 2001  - 2010  - 2016  - 7
A:
1991