Loknath Bal, Ambika Chakraborty, Kalpana Dutt and Ganesh Ghosh were associated with which of the following?

Correct answer: (b) Indian Republican Army

Explanation

Loknath Bal, Ambika Chakraborty, Kalpana Dutt and Ganesh Ghosh were members of the Indian Republican Army (Chittagong branch) of Surya Sen ("Masterda"). On 18 April 1930 they raided the armouries at Chittagong, in the Chittagong Armoury Raid, and fought British troops in the Jalalabad hills.