Who renounced his knighthood title after 'Jallianwala Bagh' massacre?

Rabindranath Tagore

The correct answer is Option (2) → Rabindranath Tagore

The one who renounced his knighthood title after the Jallianwala Bagh massacre was Rabindranath Tagore.

Rabindranath Tagore was a renowned Bengali polymath who was awarded a knighthood in 1915 for his contributions to literature. However, he was deeply disturbed by the brutality of the Jallianwala Bagh massacre in 1919 and returned his knighthood in protest against the British Raj's actions.