The concept of Eight-fold Path forms the theme of

1. Dipavamsa
2. Divyavadana
3. Mahaparinibbana Sutta
4. Dhammacakkappavattana Sutta

Explanation

Option (d) is correct

• The Eight-fold Path (Ashtangika Marga) was first expounded by Gautama Buddha in his first sermon at Sarnath. That sermon is recorded in the Dhammacakkappavattana Sutta (Dharma Chakra Pravartana Sutta).

Answer: (d) Dhammacakkappavattana Sutta