Who played an important role in Lucknow Pact.

A. Gandhi
B. Nehru
C. Sir Syed Ahmed Khan
D. Jinnah

Quaid e Azam Muhammad Ali Jinnah played an important role in Lucknow Pact 1916.

The Lucknow Pact was an agreement reached between the Indian National Congress and the Muslim League at a joint session of both the parties held in Lucknow in December 1916. Through the pact, the two parties agreed to allow representation to religious minorities in the provincial legislatures. Wikipedia