(a) C. R. Das 

(b) Madan Mohan Malaviya and Krishna Kant 

(c) Dr. Saifuddin Kitchlew and Khwaja Hasan Nizami 

(d) M. A. Jinnah 

Ans- b

Explanation 

Madan Mohan Malaviya appeared in the High Court in 1923 to support the appeal of the 170 persons sentenced to death by the Session judge of Gorakhpur in the Chauri Chaura case. In this case 225 persons had been tried for setting fire to the police station of Chauri Chaura (in Deoria district) and causing the death of one Sub-Inspector and 21 constables trapped in it. 

Due to the efforts of  Barrister Krishna Kant  and Mahamana Madan Mohan Malaviya, around 150 freedom fighters were saved from hanging.

Read: Previous Year UPSC History Questions (PYQs) With Explanation 2025