Law day is observed on :

The correct option is 26th November.

Explanation and Background:

In India, Law Day (also known as Constitution Day or Samvidhan Divas) is celebrated every year on 26th November.

Key Historical Facts:

1. On 26th November 1949, the Constituent Assembly of India formally adopted the Constitution of India.
2. The Constitution later came into full effect on 26th January 1950, which is celebrated as Republic Day.
3. In 1979, the Supreme Court Bar Association, under the leadership of Dr. L.M. Singhvi, declared 26th November as "Law Day" to fulfill the pledge of democracy, fundamental rights, and the rule of law.
4. Later, in 2015, the Government of India officially designated 26th November as Constitution Day to honor the contribution of Dr. B.R. Ambedkar and spread awareness about constitutional values.