The members of the Constituent Assembly were not elected on the basis of universal franchise. In the winter of 1945-46 provincial elections were held in India. The Provincial Legislatures then chose the representatives of the Constituent Assembly. The Constituent Assembly that came into being was dominated by one party.

Which party chose to boycott the Constituent Assembly?

The Muslim League

Muslim League captured most of the reserved Muslim seats. But the League chose to boycott the Constituent Assembly, pressing its demand for Pakistan with a separate constitution.