The correct answer is A - (iv), B - (i), C - (ii) and D - (iii) Key Points Rowlatt Satyagraha: In 1919, Gandhiji gave a call for a satyagraha against the Rowlatt Act that the British had just passed. The Act curbed fundamental rights such as the freedom of expression and strengthened police powers. The Rowlatt Satyagraha turned out to be the first all-India struggle against the British government. During the Rowlatt Satyagraha the participants tried to ensure that Hindus and Muslims were united in the fight against British rule. Hindustan Socialist Republic Organization: Revolutionary nationalists such as Bhagat Singh, Chandra Shekhar Azad, Sukhdev and others wanted to fight against the colonial rule and the rich exploiting classes through a revolution of workers and peasants. For this purpose they founded the Hindustan Socialist Republican Association (HSRA) in 1928 at Ferozeshah Kotla in Delhi. Communist Party of India: It was formed in 1925 at the Indian Communist Conference in Kanpur.