The correct option is A Hector Munro
The Battle of Buxar was a conflict at Buxar in northeastern India between the forces of the British East India Company led by Hector Munro and the combined army of an alliance of Indian states including Bengal, Awadh, and the Mughal Empire. It was a decisive battle confirmed British power over Bengal and Bihar and marked the end of the attempt to rule Bengal through a puppet nawab.