Solution:Moplah Revolt (1921) – Was the culmination of a series of riots by Mappila Muslims of Kerala in the 19th and early 20th centuries against the British and the Hindu landlords in Malabar.Khilafat Movement (1919-24) – The Khilafat Movement, (1919-24), was a movement of Indian Muslims, led by Muhammad Ali and Shaukat Ali and supported by Mahatma Gandhi.
Home Rule Movement (1916) – Was started in April 1916 and September 1916, respectively, by Indian nationalist Bal Gangadhar Tilak and British social reformer Annie Besant.
Jallianwala Bagh Massacre (April 13, 1919) – Incident occurred on April 13, 1919, in which British troops fired on a large crowd of unarmed Indians in an open space known as the Jallianwala Bagh in Amritsar in the Punjab region (now in Punjab state) of India, killing thousands and wounding many thousands more. Hence, option (a) is the correct answer.