The Viceroy of India at the time of the Quit India Movement was Lord Linlithgow. The Quit India Movement, also known as the August Movement, was launched by Mahatma Gandhi on August 8, 1942, demanding an end to British rule in India. Lord Linlithgow served as the Viceroy from 1936 to 1943 during a critical period in Indian history, which included World War II and the Quit India Movement.

Ishwar Chandra Vidyasagar has written a book named 'Barna Parichay'. This book was published in 1855 and was the first modern introduction to the Bengali language. This book played an important role in the promotion and spread of Bengali language.

The correct answer is 9th century AD. The Chola Empire of the South emerged in the 9th century AD (850-1279 AD). Vijayalaya captured Tanjore in 850 AD. The greatest Chola ruler was Rajaraja (985-1014 AD) and Rajendra I (1014-1044 AD).