The Constitution of our country was prepared under the leadership of

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

Step-by-Step Explanation:

1. Drafting Committee Chairman: Dr. Bhim Rao Ramji Ambedkar (popularly known as Babasaheb Ambedkar) was appointed as the Chairman of the Drafting Committee set up by the Constituent Assembly on August 29, 1947.

2. Father of the Indian Constitution: Under his leadership, the committee prepared the draft of the Constitution of India. Due to his pivotal role, expertise in law, and immense contribution to framing the Constitution, he is widely recognized as the "Father of the Indian Constitution".

3. Adoption of the Constitution: The Constituent Assembly adopted the Constitution on November 26, 1949, and it came into effect on January 26, 1950.