Sushruta, often hailed as the father of surgery, is credited with performing some of the earliest documented instances of plastic surgery. His contributions, detailed in the ancient Indian text known as the "Sushruta Samhita," outline various surgical techniques.
Among his many achievements, Sushruta is particularly noted for pioneering reconstructive surgery on the nose, a procedure known as rhinoplasty. This was remarkable because the need for nasal reconstruction often arose due to the cultural practice of nose amputation as a punishment.
Thus, the correct answer to the question of what Sushruta first performed plastic surgery on is:
Nose