How many sessions of the Constituent Assembly were held between December 1946 to November 1949 before the Indian Constitution came into effect? 

11

The correct answer is Option (3) → 11

In all the constituent assembly held eleven sessions, with sittings spread over 165 days before the Indian Constitution came into effect.

The Constitution of India was framed between December 1946 and November 1949. During this time its drafts were discussed clause by clause in the Constituent Assembly of India. In all, the Assembly held eleven sessions, with sittings spread over 165 days. In between the sessions, the work of revising and refining the drafts was carried out by various committees and sub-committees.