Correct option is A
The correct answer is (a) On 13 April 1919, at Amritsar.
• The Jallianwala Bagh massacre took place on 13 April 1919.
• The incident occurred in Jallianwala Bagh, a public garden in Amritsar, Punjab.
• On this day, a large crowd had gathered in the garden to peacefully protest against the Rowlatt Act, which allowed the British government to imprison people without trial.
• Brigadier General Reginald Dyer ordered his troops to fire on the unarmed crowd, resulting in the death of hundreds of men, women, and children, and injuring many more.
• The massacre is considered one of the most tragic and significant events in Indian history, highlighting the brutal repression of peaceful protests by the British colonial authorities.