In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: The House of Hanover (or the Hanoverians ) is a German royal dynasty that ruled the Electorate and then the Kingdom of Hanover, and that also provided monarchs of Great Britain and Ireland from 1714 and ruled the United Kingdom until the death of Queen Victoria in 1901. Upon Victoria's death, the British throne passed to her eldest son Edward VII, a member of the House of Saxe-Coburg and Gotha through his father. 
The House of Hanover was formally named the House of Brunswick-Lüneburg, Hanover line, as it was originally a cadet branch of the House of Brunswick-Lüneburg. The senior branch became extinct in 1884, and the House of Hanover is now the only surviving branch of the House of Welf, which is the senior branch of the House of Este. The current head of the House of Hanover is Ernst August, Prince of Hanover., George III (George William Frederick; 4 June 1738  29 January 1820) was King of Great Britain and Ireland from 25 October 1760 until the union of the two countries on 1 January 1801, after which he was King of the United Kingdom of Great Britain and Ireland until his death. He was concurrently Duke and prince-elector of Brunswick-Lüneburg ("Hanover") in the Holy Roman Empire until his promotion to King of Hanover on 12 October 1814. He was the third British monarch of the House of Hanover, but unlike his two predecessors he was born in Britain, spoke English as his first language, and never visited Hanover., Princess Mary , Duchess of Gloucester and Edinburgh ( 25 April 1776 -- 30 April 1857 ) was the 11th child and 4th daughter of King George III of the United Kingdom . She married her first cousin , Prince William Frederick , Duke of Gloucester and Edinburgh , when both were 40 , and was his widow in later life . In her last years , her niece , Victoria , was on the throne as the fourth monarch during Mary 's life , after her father and two of her brothers . Princess Mary was the longest - lived ( at 81 years ) and last survivor of George III 's fifteen children ; of those fifteen issue , thirteen lived to adulthood . She was also the only one of George III 's children to be photographed . She died on 30 April 1857 at Gloucester House , London ., Subject: princess mary, Relation: noble_family, Options: (A) house of este (B) house of hanover
house of hanover