Exp) Option b is the correct answer.

Madan Mohan Malaviya earned his law degree from Allahabad University in 1891 and practiced law at the Allahabad High Court. He was known as a brilliant Civil Lawyer and was highly respected by his peers. When he appeared in the High Court in 1923 after an interval of ten years, it was 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.

Source: Mahamana Madan Mohan Malaviya