Correct Option: B

Dhanavantri was a physician. Dhanavantri is depicted as Vishnu with four hands, holding medical herbs in one hand and a pot containing rejuvenating nectar called amrita in another. He is often shown with a leech in his hand rather than the scriptures. The Puranas state that Dhanavantri emerged from the 'Ocean of Milk' and appeared with the pot of nectar during the story of the Samudra or Sagar Manthan whilst the ocean was being churned by the Devas and Asuras , using the Mandara mountain and the serpent Vasuki.