Explanation:

2341

Bhagat Singh, 23, was hanged by British rulers on March 23, 1931 in Lahore, after being tried under charges for hatching a conspiracy against the colonial government. The case was filed against Singh, Sukhdev and Rajguru for allegedly killing British police officer John P Saunders.

The Kakori Conspiracy' was a train robbery that took place between Kakori and, near Lucknow, on 9 August 1925 during the Indian Independence Movement against the British Raj. The robbery was organised by Hindustan Republican Association. 

Chittagong armoury raid, also known as the Chittagong uprising, was an attempt on 18 April 1930 to raid the armoury of police and auxiliary forces from the Chittagong armoury in the Bengal Presidency of British India (now in Bangladesh) by armed Indian independence fighters led by Surya Sen.

Emperor vs Aurobindo Ghosh and others, colloquially referred to as the Alipore Bomb Case, the Muraripukur conspiracy, or the Manicktolla bomb conspiracy, was a criminal case held in India in 1908.