Correct option is A
Here's the correct matching of the incidents with their respective years:
List of Incidents and Their Years:
A. First Visit by an Indian Prime Minister to China → III. 1954
Jawaharlal Nehru became the first Indian PM to visit China in 1954, strengthening Panchsheel (Five Principles of Peaceful Coexistence).
B. Soviet-Indian Treaty of Peace, Friendship and Co-operation → II. 1971
Signed on August 9, 1971, during the Bangladesh Liberation War, ensuring Soviet support against US-Pakistan alliances.
C. Indian Nuclear Test-2 (Pokhran-II) → IV. 1998
Conducted under PM Atal Bihari Vajpayee on May 11 & 13, 1998, declaring India a nuclear weapons state.
D. 26/11 Mumbai Terror Attack → I. 2008
November 26–29, 2008: Lashkar-e-Taiba carried out coordinated attacks across Mumbai, killing 166 people.
Correct Answer: (a) A-III, B-II, C-IV, D-I