Who among the following organised the famous Chittagong armoury raid?

The correct answer is B because Surya Sen, popularly known as Masterda, was the main architect and leader of the Chittagong armoury raid in April 1930. He was a school teacher by profession and a prominent revolutionary leader of the Indian Republican Army. Along with his group of revolutionaries, he planned the raid to capture two main armouries in Chittagong to seize weapons and disrupt the British administration. While the other options were also involved in the freedom struggle, Laxmi Sehgal is associated with the Indian National Army, Batukeshwar Datta with the 1929 Central Legislative Assembly bombing alongside Bhagat Singh, and J.M. Sengupta was a prominent Congress leader from Bengal.