Who was the Constitutional Advisor to the Constituent Assembly in framing the Indian Constitution?
a. Dr. Rajendra Prasad
b. Dr. B.R. Ambedkar
c. Sir B.N. Rau
d. Pandit Jawaharlal Nehru

Hint:
- In 1934, MN Roy, a pioneer of the Communist movement in India and an advocate of radical democracy, proposed an idea for a Constituent Assembly.
- He was a famous Jurist and later appointed a judge in International Court of Justice (ICJ) in Hague, Netherlands

Complete solution:

Dr. Rajendra Prasad:
- He was elected as the president of the constituent assembly
- He was appointed the head of various other committees such as Committee on the Rules of Procedures, Steering Committee, Finance & Staff Committee, Ad Hoc Committee on the National Flag

Dr B. R. Ambedkar:
- He is regarded as the father of the Indian Constitution for his contribution, in the capacity of the Chairman of the Drafting Committee, to the drafting of the Constitution.
- In creating a Constitution that was both equitable and accommodative to the needs of all parts of society, he played a significant role.

Sir B.N. Rau:
- Jurist B. N. Rau was appointed the constitutional advisor to the assembly.
- Based on the findings and his study into other nations' constitutions, He prepared an initial draft.
- He prepared the original draft constitution, and was later appointed a judge at the Permanent Court of International Justice in The Hague.

Pandit Jawaharlal Nehru:
- He was elected on a Congress Party ticket from the United Provinces to the Constituent Assembly and held important positions on different committees.
- He regularly engaged in discussions at the Assembly and talked about the resolution of the goals and the national language.

Hence, the correct answer is option C.

Note:
- The constitution of a country consists of a legislative body known as the Constituent Assembly, consisting of representatives elected (directly or indirectly) or appointed by the citizens of that country.
- Thus the primary aim of a Constituent Assembly is to draft the Constitution of the country.
- A Constituent Assembly also drafted the Constitution of India, the need for which was implied in the struggle for national liberty from around 1918.