The Constitution of India was adopted on 26th November 1949 by the Constituent Assembly.
However, it came into force on 26th January 1950, marking the transition of India to a Republic.
Why 26th January?
- The date was chosen to commemorate the Purna Swaraj (complete independence) declaration made by the Indian National Congress in 1930.
Option analysis:
- Option (A): Incorrect — one day before Republic Day.
- Option (B): Correct — actual enforcement date.
- Option (C): Incorrect — date of adoption, not enforcement.
- Option (D): Incorrect — historically inaccurate.