Please answer the following question: Information:  - The Vijayanta (en: "Victorious") was a main battle tank built in India based on a licensed design of the Vickers Mk.1. The Vijayanta was the first indigenous tank of the Indian Army. The prototype was completed in 1963 and the tank entered service in 1965. The first 90 vehicles were built by Vickers in the UK. Production continued at the Heavy Vehicles Factory in Avadi until 1983 with 2,200 being built (other sources give much lower numbers: 1,600-1,800). A number of the tank hulls were converted to other uses such as self-propelled guns after being withdrawn from service. The Vijayanta has been supplanted by the T-72M1 in Indian service.  - Vickers-Armstrongs Limited was a British engineering conglomerate formed by the merger of the assets of Vickers Limited and Sir W G Armstrong Whitworth & Company in 1927. The majority of the company was nationalised in the 1960s and 1970s, with the remainder being divested as Vickers plc in 1977.  - Vickers Limited was a significant British engineering conglomerate that merged into Vickers-Armstrongs in 1927.  - Vickers plc was the remainder of Vickers-Armstrongs after the nationalisation of three of its four operating groups: aviation (as a 50% share since 1960 of British Aircraft Corporation (BAC) in 1977), shipbuilding (Vickers Limited Shipbuilding Group in 1977) and steel. It was purchased by Rolls-Royce plc in 1999, and the Vickers company name became defunct in 2004.  - 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.  - Vickers was a famous name in British engineering that existed through many companies from 1828 until 1999.  - The Vickers MBT is a series of main battle tanks ( MBTs ) developed as a private venture by Vickers - Armstrongs for export . The design makes use of proven components such as the L7 gun of the Centurion , and the Leyland L60 multi-fuel engine , transmission and fire control system of the Chieftain . A large number of tanks were also built by India under licence as the Vijayanta .  - Avadi is a suburb city of Chennai and a municipality in Thiruvallur in the state of Tamil Nadu, India. Situated about 25 km west of Chennai, it is surrounded by major defense establishments. The neighborhood is served by Avadi Railway Station of the Chennai Suburban Railway. As of 2011, the town had a population of 345,996. The Heavy Vehicles Factory (HVF) is located in Chennai Avadi.    After reading the paragraphs above, we are interested in knowing the entity with which 'vickers mbt' exhibits the relationship of 'service entry'. Find the answer from the choices below.  Choices: - 1927  - 1960  - 1963  - 1965  - 1971  - 1999  - 2004  - 2011
Answer:
1965