In which year did Assam become a constituent state of India?

The correct answer is option 3 , i.e. 1950 . During the British rule, Assam Province with its capital in Shillong was a province of British India, created in 1912 by the partition of the Eastern Bengal and Assam Province. At the time of independence in 1947 , India comprised two categories of political units, namely, the British provinces (under the direct rule of British government) and the princely states (under the rule of native princes but subject to the paramountcy of the British Crown). In 1950, the Constitution contained a four-fold classification of the states and territories of the Indian Union – Part A, Part B and Part C states and Part D territories where Part A states comprised nine erstwhile governor’s provinces of British India. Thus, Assam became a constituent state of India in 1950 .