When did the Constitution of India come into force?

The correct option is 26th January, 1950.

Step-by-step Explanation:

1. Adoption of the Constitution: The Constituent Assembly of India drafted the Constitution of India over a period of almost three years. The drafting process was completed, and the Constitution was formally adopted by the Constituent Assembly on 26th November, 1949.

2. Coming into Force: Although adopted in November 1949, the Constitution officially came into force on 26th January, 1950. This day is celebrated annually in India as Republic Day, marking the transition of the nation into an independent, sovereign democratic republic.

3. Historical Significance of 26th January: The date 26th January was specifically chosen for its historical significance in the Indian independence movement. On 26th January 1930, the Indian National Congress had promulgated the declaration of Purna Swaraj (Complete Independence) in opposition to the British Empire's Dominion status. To honor this historic milestone, 26th January was selected as the commencement day for the Constitution.