Consider the following statements:

1. The idea of a Constituent Assembly for India was recommended by M. N. Roy.

2. Dr. Sachchidanand Sinha had been elected as the Vice-President of the Assembly.

3. Dr. Rajendra Prasad was elected as the President of the Assembly since its inception.

Which of the statements given above is/are correct?

Dr. Sachchidanand Sinha, the oldest member, was elected as the temporary President of the Assembly, following the French practice. Later, Dr. Rajendra Prasad was elected as the President of the Assembly. Similarly, both H.C. Mukherjee and V.T. Krishnamachari were elected as the Vice-Presidents of the Assembly. The idea of a Constituent Assembly for India was put forward, for the first time, by M. N. Roy, a pioneer of Communist Movement in India.