The question asks to identify the famous ancient Indian medical practitioner who treated the Magadha emperor Bimbisara.
Historical records and traditional accounts identify Jivaka (also known as Jīvaka Komārabhacca) as a renowned physician during the time of the Buddha and Emperor Bimbisara.
Jivaka served as the personal physician to Emperor Bimbisara of the Magadha empire. His contributions to ancient Indian medicine, particularly in surgery and general medicine, are well-documented.
Charaka and Susruta were also prominent physicians from ancient India, known for the Charaka Samhita and Sushruta Samhita respectively, but Jivaka is specifically associated with treating Bimbisara.
Therefore, the correct identification is Jivaka.
Correct Answer: 3. Jivaka