Pakistan conducted its first nuclear test on:

Pakistan conducted its first nuclear test, codenamed Chagai-I, on May 28, 1998, at Ras Koh Hills in the Chagai District of Balochistan. This event marked Pakistan's entry into the exclusive club of nuclear powers, a response to India's nuclear tests earlier that month. Option A is correct as it precisely states this historic date. Option B, August 14, 1947, is Pakistan's Independence Day. Option C, October 12, 2000, refers to a military coup. Option D, June 10, 2002, is an unrelated date, making these distractors incorrect.