The Constitution of our country was prepared under the leadership of

The correct answer is Dr. Bhim Rao Baba Saheb Ambedkar.

Step-by-Step Explanation:

1. Drafting Committee: On August 29, 1947, the Constituent Assembly set up a Drafting Committee to prepare a draft Constitution for India. Dr. B. R. Ambedkar was appointed as the Chairman of this Drafting Committee.

2. Father of the Indian Constitution: Under his visionary leadership, guidance, and meticulous drafting, the Indian Constitution was framed. Due to his major role and outstanding contribution in drafting the Constitution, Dr. B. R. Ambedkar is widely recognized as the "Father of the Indian Constitution".

3. Adoption of the Constitution: The Drafting Committee finalized the Constitution, which was adopted by the Constituent Assembly on November 26, 1949, and came into full effect on January 26, 1950.