The correct answer is option 1, V.S. Naipaul. He is the author of the book "India: A Million Mutinies Now". It is important to note that the other options listed are also renowned authors, but they are not the authors of this particular book.

Option 2, Mulk Raj Anand, is known for his works that focus on the social issues faced by the underprivileged in Indian society. Some of his famous works include "Untouchable" and "Coolie".

Option 3, Nirad C. Chaudhuri, was an Indian Bengali writer who is well-known for his book "The Autobiography of an Unknown Indian". This book is a memoir of his life and experiences in British India.

Option 4, Amitav Ghosh, is a contemporary Indian author known for his works that blend historical events with fiction. Some of his popular books include "The Shadow Lines" and "The Glass Palace".

Therefore, it is important to select option 1, V.S. Naipaul, as the correct answer for the author of the book "India: A Million Mutinies Now".