Who among the following personalities was appointed as the legal advisor of the Constituent Assembly that drafted the document of the Constitution?

Correct option is D

BN Rau was appointed as the legal advisor of the Constituent Assembly that drafted the document of the Constitution. As the Constitutional Advisor, he prepared the initial draft of the Constitution, on which the various discussions and modifications were made by the Constituent Assembly.
- HVR Iyengar, S.N. Mukherjee, and B.R. Ambedkar played significant roles in the formation and implementation of the Indian Constitution, with Ambedkar being the Chairman of the Drafting Committee.