Read the passage and answer the questions:
Besides this Congress trio, a very important member of the Assembly was the lawyer and economist B.R. Ambedkar. He had been a political opponent of the Congress; but, on the advice of Mahatma Gandhi, he was asked at Independence to join the Union Cabinet as law minister.

Who was the Constitutional Advisor to the Government of India?
1. B.N. Rau
2. K.M. Munshi
3. Alladi Krishnaswamy Aiyar
4. Baldev Singh

1

B. N. Rau, Constitutional Advisor to the Government of India, prepared a series of background papers based on a close study of the political systems obtained in other countries in the constituent assembly.