KBC 13: What is the 7 crore question that made Himani Bundela quit?

Himani Bundela, on Tuesday, was the first contestant to win 1 crore in the Kaun Banega Crorepati season 13 that is hosted by Amitabh Bachchan. However, she was forced to quit as she could not answer the 7 crore question. 

KBC 2021: What was the title of the thesis that Dr BR Ambedkar submitted to the London School of Economics for which he was awarded his doctorate in 1923?

A. The wants and means of India

B. The problem of the rupee

C. National dividend of India

D. The Law And Lawyers

Answer: B. The problem of the rupee