Explanation:

- Option 1: Ram Prasad Bismil

- Correct! He was indeed one of the founders of the Hindustan Republic Association (HRA), which was established in 1924 as a revolutionary organization aimed at ending British rule in India.

- Option 2: Lala Lajpat Rai

- He was a prominent leader in the Indian Indian Nationalist Movement, associated with the Indian National Congress and part of the Lal Bal Pal triumvirate, but not directly related to the founding of the HRA.

- Option 3: Jatindranath Mukherjee

- Also known as Bagha Jatin, he was a revolutionary leader involved in the Indian independence struggle but was not a founder of the HRA.

- Option 4: Surya Sen

- Known for the Chittagong armory raid, he was a freedom fighter against British rule but not a direct founder of the HRA.