When was the Constitution of India signed?

December 1949

The correct answer is Option (1) → December 1949

The Constitution was signed in December 1949 after three years of debate.

Note: The given answer is as per the NTA answer key and the NCERT History Book (page 341). But this date is wrong- Constitution of India was signed by the members of the Constituent Assembly on January 24, 1950. That said, the CUET exam is strictly based on this textbook, so answers must be selected exactly according to what is stated there.