Q. Which of the following Buddhist school was associated with the “doctrine of elders”?
Answer: C
Notes:
Explanation: Theravada signifies ‘Doctrine of the Elders’. Theravada was the original school of Buddhist philosophy. Its scriptures are in Pali, the language that Buddha taught in.
At present, Theravada Buddhism is to be found in Sri Lanka, its main bastion, and in Myanmar, Thailand, and other parts of Southeast Asia.
Source: Tamil Nadu NCERT

