Correct Answer: (a) The Battle of Buxar
Solution:On 22/23 October, 1764 British Army defeated allied forces of Mir Qasim, Nawab of Oudh Shuja-ud-Daula and Mughal emperor Shah Alam II. British Army's command was in the hands of Major Hector Munro in the Battle of Buxar. The battle of Buxar assured the result of Plassey battle and established British supremacy on Banaras and Allahabad across the Ganges. The battle of Buxar made way for British and proved that there is no strong competitor before the British. The battle of Buxar completed what Plassey had begun. According to Sir James Stephen. "The battle of Buxar deserves more credit than the battle of Plassey as the origin of British power in India". If the results of both significant battles are analyzed, it can be said that the battle of Plassey was won by treachery, but the battle of Buxar showed the supremacy of English armies and military skills. Plassey made the English the only controller of Bengal while Buxar raised the political prestige of the Company throughout India.