The correct option is A Buxar
During the mercantile phase of British capitalism, the height of the company's profits and power came from its acquisition of the wealthiest region under the Mughal Empire, which was Bengal. The British made even more money by getting 1.2 million pounds after the Battle of Plassey in 1757. The company went on to gain the Murshidabad treasury after the Battle of Buxar in 1764.