The correct answer is: A. 1876
The Chief Commissionership of Assam was established in 1874. However, it was not until 1876 that the first Chief Commissioner, Sir Henry Cotton, took office.
The Chief Commissionership was a form of government that was introduced in India by the British East India Company in the early 19th century. It was a system of direct rule, in which the British government appointed a Chief Commissioner to administer a particular region.
The Chief Commissionership of Assam was one of the first Chief Commissionerships to be established in India. It was created in response to the growing unrest in the region, which was caused by a number of factors, including the British government’s policies of economic exploitation and religious discrimination.
The Chief Commissionership of Assam was abolished in 1947, when India gained independence from British rule. However, the legacy of the Chief Commissionership can still be seen in the region today. For example, the state of Assam is still divided into districts, which were originally created by the British government during the Chief Commissionership.
The other options are incorrect because they are not the years in which the Chief Commissionership of Assam was established.