The correct answer is A. Karan Singh.
Karan Singh was the last Maharaja of Jammu and Kashmir and a member of the Indian Parliament. He was also a diplomat and a writer. His autobiography, "My Life and Times", was published in 1989.
Syed Mir Qasim was the Chief Minister of Jammu and Kashmir from 1975 to 1984. He was a member of the Indian National Congress.
Prithvi Nath Dhar was a diplomat and a political scientist. He was a close advisor to Indira Gandhi.
None of these options is the autobiography of Karan Singh.