Correct answer: D. Baisakhi
Explanation: Direct answer: Option D, Baisakhi. The Jallianwala Bagh massacre occurred on 13 April 1919 in Amritsar, Punjab. That date was Baisakhi, an important harvest festival and a day when many people gathered in the city. General Reginald Dyer ordered troops to fire on the unarmed crowd gathered at Jallianwala Bagh, making the event a major symbol of colonial repression. Option D is correct because Baisakhi identifies the festival on that date. Option A, Diwali, is the festival of lights and falls on a different date, usually in October or November. Option B, Holi, is the spring festival of colours and generally occurs in February or March. Option C, Eid, is an Islamic festival whose date changes according to the lunar calendar; it was not the festival linked to this massacre. Memory chain: 13 April 1919—Amritsar—Jallianwala Bagh—Baisakhi.