The correct answer is B. 1961.
Operation Vijay was a military operation conducted by the Indian Armed Forces in December 1961 to annex the Portuguese Indian territories of Goa, Daman, and Diu. The operation was successful, and the territories were integrated into India on December 19, 1961.
Option A is incorrect because 1947 was the year of India’s independence from British rule.
Option C is incorrect because 1967 was the year of the Indo-Pakistani War.
Option D is incorrect because 1977 was the year of the Janata Party’s victory in the Indian general election.