Consider the following statements:
1. M. N. Roy was the first to demand a Constituent Assembly for India in 1934.
2. Indian National Congress, for the first time, made a formal demand for a Constituent Assembly at its Tripuri Session in 1939.
3. The demand for Constituent Assembly was finally accepted by the British under the Cabinet Mission Plan of 1946.
Which of the statements given above is/are not correct?