Concept:
- Bharat Ratna is India's highest civilian award, and its medal has a fixed, officially defined design.
- The medal is shaped like a peepal leaf, made of bronze/toned bronze, with a sun motif and the words 'Bharat Ratna' inscribed on it, and a wreath of wheat ears on the reverse.
- Other leaf shapes like banyan or mango are not part of this award's actual specification, they are simply distractor shapes.
Step 1: Recall which award is being asked about.
The question is about the physical shape of the Bharat Ratna medal specifically, not any other civilian award.
Step 2: Recall the actual documented design.
The Bharat Ratna medal is officially peepal leaf shaped, with a sun symbol and the award's name inscribed on the front.
Step 3: Eliminate the other leaf shapes.
Ashoka leaf, banyan leaf, and mango leaf are not the real specified shape of this medal, they are only meant to test if the exact detail is remembered correctly.
Final Answer: Peepal leaf shaped