The correct answer is C. Operation Vijay.
Operation Vijay was the code name for the Indian military operation that liberated Goa, Daman, and Diu from Portuguese rule on December 19, 1961. The operation was launched after the Indian government gave the Portuguese an ultimatum to withdraw from the territories, which they had occupied for over 450 years. The Portuguese refused to comply, and the Indian military launched a three-pronged attack on the territories. The operation was successful, and Goa, Daman, and Diu were integrated into the Indian Union.
Option A, Operation Meghadoot, was the code name for the Indian military operation that captured the Siachen Glacier from Pakistan in 1984. Option B, Operation Ramji, was the code name for the Indian military operation that liberated the Andaman and Nicobar Islands from Japanese occupation during World War II. Option D, Operation Prakram, was the code name for the Indian military operation that liberated Bangladesh from Pakistani occupation in 1971.