Explanation:

Soon after the Battle of Buxar, Shah Alam II, a sovereign who had just been defeated by the British, sought their protection by signing the Treaty of Allahabad in the year 1765. Shah Alam II was forced to grant the Diwani (right to collect revenue) of Bengal (which included Bihar and Odisha) to the British East India Company in return for an annual tribute of 2.6 million rupees to be paid by the company from the collected revenue. Tax exempt status was also restored to the company.