The correct option is B Kanthaka
Buddha, whose original name was Siddhartha Gautama, was the founder of Buddhism. He was born in Lumbini into the Shakya clan and thought to have lived in India from 563 B.C. to 483 B.C. Kanthaka was the horse who accompanied Siddhartha in all important expeditions. He was the horse pulling the chariot when Channa, the charioteer was explaining the four sights of an elderly man, a sick person, a dead person and an ascetic to Siddhartha.