When was the 1st meeting of the constituent assembly held and what decisions were taken?

The first meeting of the Constituent Assembly of India took place in Constitutional Hall, New Delhi, on 9th December 1946. Dr. Sachchidananda Sinha was the first president of the Constituent Assembly. In the first meeting, the assembly adopted an ‘objective resolution’ which later became the preamble of the constitution.
It appointed various committees. The report of the committees formed the basis on which the first draft of the Constitution was prepared.