Correct Answer: (b) 21ˢᵗ January, 2020
Solution:Manipur, Meghalaya and Tripura celebrated their 48th Statehood Day on 21st January, 2020. On 21 January 1972, the three states of Manipur, Tripura, and Meghalaya became full-fledged states under the North Eastern Region (Reorganisation) Act of 1971.