The correct answer is A. Mir Qasim.
Mir Qasim was the Nawab of Bengal from 1756 to 1760. He was defeated by the British in the Battle of Plassey in 1757, which marked the beginning of British rule in India.
Jagannath Dhal was a Bengali general who fought against the British in the Battle of Plassey. He was defeated and killed in the battle.
Shah Alam II was the Mughal emperor from 1759 to 1760. He was defeated by the British in the Battle of Buxar in 1764, which marked the end of Mughal rule in India.
Govind Singh was a Rajput ruler who fought against the Mughals in the 17th century. He was defeated by the Mughals in the Battle of Khanwa in 1658.
The British gained control of Rajmahal area by defeating Mir Qasim in the Battle of Plassey in 1757.