The correct answer is: B. Jawahar Lal Nehru.
The book “The Wonder that was India” was written by Jawaharlal Nehru, the first Prime Minister of India. It was first published in 1956 and is a comprehensive history of India from the Indus Valley Civilization to the Mughal Empire. The book is divided into three parts: the first part deals with the ancient period, the second part deals with the medieval period, and the third part deals with the modern period. Nehru’s book is considered to be one of the most authoritative works on Indian history.
Option A is incorrect because J. Joshi is not the author of the book “The Wonder that was India”.
Option C is incorrect because R. K. Mehta is not the author of the book “The Wonder that was India”.
Option D is incorrect because A. L. Bansal is not the author of the book “The Wonder that was India”.