Explanation:

• In 2021, April 13 marks the 102nd anniversary of the Jallianwala Bagh Massacre, that took place on April 13, 1919 at Jallianwala Bagh in Punjab’s Amritsar.
• Jallianwala Bagh Massacre refers to the incident in which the troops of the British Indian Army, under the command of Colonel Reginald Dyer, fired machine guns into a crowd of unarmed protesters and pilgrims, who had gathered in Jallianwala Bagh , to mark the occasion of Baisakhi.