Information:  - Iran (, also , ; ' ), also known as Persia, officially the Islamic Republic of Iran (' ), is a sovereign state in Western Asia. It is bordered to the northwest by Armenia, the "de facto" Nagorno-Karabakh Republic, and Azerbaijan; to the north by the Caspian Sea; to the northeast by Turkmenistan; to the east by Afghanistan and Pakistan; to the south by the Persian Gulf and the Gulf of Oman; and to the west by Turkey and Iraq. Comprising a land area of , it is the second-largest country in the Middle East and the 18th-largest in the world. With 82.8 million inhabitants, Iran is the world's 17th-most-populous country. It is the only country with both a Caspian Sea and an Indian Ocean coastline. The country's central location in Eurasia and Western Asia, and its proximity to the Strait of Hormuz, make it of great geostrategic importance. Tehran is the country's capital and largest city, as well as its leading economic center.  - Bey (/Bey, / "Beye", / "Beg" or "Beyg") is a Turkish title for chieftain, traditionally applied to the leaders (for men) of small tribal groups.  The feminine equivalent title was Begum. The regions or provinces where "beys" ruled or which they administered were called "beylik", roughly meaning "khanate", "emirate" or "principality" in the first case, "province" or "governorate" in the second (the equivalent of duchy in other parts of Europe). Today, the word is still used informally as a social title for men (somewhat like the English word "mister" and the French word "monsieur", which literally means "my lord"). Unlike "mister" however, it follows the name and is used generally with first names and not with last names.  - Anatolia (from Greek , '  "east" or "(sun)rise"; in modern ), in geography known as Asia Minor (from '  "small Asia"; in modern ), Asian Turkey, Anatolian peninsula, or Anatolian plateau, is the westernmost protrusion of Asia, which makes up the majority of modern-day Turkey. The region is bounded by the Black Sea to the north, the Mediterranean Sea to the south, and the Aegean Sea to the west. The Sea of Marmara forms a connection between the Black and Aegean Seas through the Bosphorus and Dardanelles straits and separates Anatolia from Thrace on the European mainland.  - Begum, begam, baigum or beygum (, ) is a female royal and aristocratic title from Central and South Asia. It is the feminine equivalent of the title "baig" or "bey", which in Turkic languages means "higher official". It usually refers to the wife or daughter of a "beg". The related form "begzadi" (daughter of a "beg") also occurs.  - Malhun Hatun (died November 1323, other names "Mal Hatun, Mala Hatun, Kameriye Sultana") was the first wife of Osman I, the leader of the Ottoman Turks and the founder of the dynasty that established and ruled the Ottoman Empire. She was the mother of the next and second ruler of the Ottoman State, Orhan. Biography. It has been recognized by many historians that she was the daughter of the Anatolian Turkish Bey, "Ömer Bey", although there had been some speculations that she was the daughter of Sheikh Edebali. Other sources say that she was the daughter of Ömer Abdülaziz Bey, Seljuk vizier of Anatolia.  - Erturul (Erorl; often with the title "Gazi") (died c. 1280) was the father of Osman I, the founder of the Ottoman Empire. While his historicity is proven by coins minted by Osman I which identify Erturul as the name of his father, nothing else is known for certain about his life or activities. According to Ottoman tradition, he was the son of Suleyman Shah, leader of the Kay tribe of Oghuz Turks, who fled from eastern Iran to Anatolia to escape the Mongol Conquests. According to this legend, after the death of his father, Erturul and his followers entered the service of the Seljuks of Rum, for which he was rewarded with dominion over the town of Söüt on the frontier with the Byzantine Empire. This set off the chain of events that would ultimately lead to the founding of the Ottoman Empire. Like his son, Osman, and their future descendants, Erturul is often referred to as a "Ghazi", a heroic champion fighter for the cause of Islam.  - Orhan Ghazi ben Osman ( Ottoman Turkish :    , Turkish : Orhan Gazi ; 1281 -- March 1362 ) was the second bey of the nascent Ottoman Empire ( then known as the Ottoman Beylik or Emirate ) from 1326 to 1362 . He was born in Söüt , the son of Osman I and Malhun Hatun . His grandfather was Erturul , and his grandmother was Halime Sultan . In the early stages of his reign , Orhan focused his energies on conquering most of northwestern Anatolia . The majority of these areas were under Byzantine rule and he won his first battle , at Pelekanon , against the Byzantine Emperor Andronikos III Palaiologos . Orhan also occupied the lands of the Karasids of Balkesir and the Ahis of Ankara . A series of civil wars surrounding the ascension of the nine - year - old emperor John V Palaiologos benefited Orhan greatly . In the Byzantine civil war of 1341 -- 1347 , the regent John VI Kantakouzenos married his daughter Theodora to Orhan and employed Ottoman warriors against the rival forces of the queen dowager , allowing them to loot Thrace . In the Byzantine civil war of 1352 -- 1357 , Kantakouzenos used Ottoman forces against John V himself , granting them the use of a European fortress at Çimpe around 1352 . A major earthquake devastated Gallipoli ( modern Gelibolu ) two years later and Orhan 's son Süleyman Pasha occupied the town , giving the Ottomans a strong bridgehead into mainland Europe .  - The Oghuz, Oguz or Ghuzz Turks were a western Turkic people who spoke the Oghuz languages from the Common sub-division of Turkic language family. In the 8th century, they formed a tribal confederation conventionally named the Oghuz Yabgu State in central Asia. The name "Oghuz" is a Common Turkic word for "tribe". Byzantine sources call the Oghuz the Uzes (, "Ouzoi"). By the 10th century, Islamic sources were calling the Muslim, as opposed to shamanist or Christian, Oghuz the Turkmens. By the 12th century this term had passed into Byzantine usage and the Oghuzes were overwhelmingly Muslim.    After reading the paragraphs above, we are interested in knowing the entity with which 'orhan of the ottoman empire' exhibits the relationship of 'mother'. Find the answer from the choices below.  Choices: - asia  - mal hatun
The answer to this question is:
mal hatun