Correct option is A
The book "Thoughts on Pakistan" was authored by Dr. B. R. Ambedkar in 1940. In this work, Ambedkar critically analyzed the demand for the creation of Pakistan and discussed the implications of the idea of dividing India based on religious lines. The book was a response to the Lahore Resolution of 1940, where the Muslim League, under the leadership of Muhammad Ali Jinnah, formally demanded a separate nation for Muslims.