The following events are presented for chronological analysis:
- India-China War (1962): In 1962, border disputes, particularly in the Aksai Chin and Arunachal Pradesh regions, led to conflict between India and China.
- India's first test of a nuclear device (1974): India successfully conducted its inaugural nuclear test, codenamed "Smiling Buddha," in May 1974, signifying its status as a nuclear power.
- Terrorists attack on World Trade Centre in America (2001): The World Trade Centre in New York City was targeted in devastating terrorist attacks on September 11, 2001, which significantly impacted global security.
- The Anti-Ballistic Missile Treaty (1972): The United States and the Soviet Union signed the ABM Treaty in 1972, establishing limitations on the development and deployment of anti-ballistic missile systems.
The correct chronological sequence of these events is:
(i) India-China War → (ii) India's first test of a nuclear device → (iii) Terrorists attack on World Trade Centre → (iv) The Anti-Ballistic Missile Treaty.
Therefore, the correct answer is (A) (i), (ii), (iii), (iv).