In which of the following years did Shah Alam grant the Diwani of Bengal province, i.e. the responsibility of collecting revenue, to the East India Company?

On August 12, 1765, following the Battle of Buxar (1764), Mughal Emperor Shah Alam II granted the Diwani rights of Bengal, Bihar, and Odisha to the British East India Company under the Treaty of Allahabad. This grant gave the Company the formal authority to collect revenues from these provinces.