Who among the following is the author of the book 'The Buddha and his Dhamma', which appeared in 1957 after the death of its author?

Correct option is B

The correct answer is: (b) BR Ambedkar.
 Dr. Bhimrao Ramji Ambedkar, a prominent Indian social reformer and scholar, wrote the book "The Buddha and his Dhamma".
 While it was published in 1957, he had completed the manuscript before his death in 1956.
 Subhas Chandra Bose wrote several essays and letters that were later compiled and published in volumes like "The Indian Struggle" and "The Essential Writings of Subhas Chandra Bose."
 Mahatma Gandhi was prolific in his writing, authoring several books like "My Experiments with Truth," "Hind Swaraj," and "Harijan."