The correct answer is C. M. O. Mathai.
M. O. Mathai was a close associate of Jawaharlal Nehru and served as his personal assistant from 1947 to 1958. He wrote the book ‘Reminiscences of the Nehru Age’ in 1978, which is a memoir of his time with Nehru. The book provides insights into Nehru’s personality and his role in shaping modern India.
A. C. D. Deshmukh was a finance minister in the Indian government from 1956 to 1964. He was a member of the Indian National Congress and a close associate of Mahatma Gandhi.
Dr. P. C. Alexander was a civil servant who served as the Governor of Tamil Nadu from 1984 to 1989. He was also the Principal Secretary to the Prime Minister of India from 1977 to 1980.
S. C. Rajagopalachari was a freedom fighter and statesman who served as the Governor-General of India from 1948 to 1950. He was also the Chief Minister of Madras Presidency from 1937 to 1939 and from 1952 to 1954.