The concept of Eight-fold path forms the theme of

The Dharmacakra Pravartana Sutta (Pāli: Dhammacakkappavattana Sutta) — literally “Setting the Wheel of Dhamma in Motion” — is the Buddha’s first sermon delivered at Sarnath, where he expounded the Four Noble Truths and the Middle Way, marking the formal presentation of his teaching [1]. The Fourth Noble Truth names the “Path Leading to the Cessation of Suffering” as the Noble Eightfold Path, making the Eightfold Path an explicit theme of this discourse [2]. Scholarly and traditional accounts identify the Dhammacakkappavattana Sutta as the canonical text that introduces these core doctrines (Four Noble Truths and the Noble Eightfold Path) to the community, confirming option 4 as correct [3].

Sources

1. [1] History , class XI (Tamilnadu state board 2024 ed.) > Chapter 3: Rise of Territorial Kingdoms and New Religious Sects > Life of Buddha > p. 41
2. [2] History , class XI (Tamilnadu state board 2024 ed.) > Chapter 3: Rise of Territorial Kingdoms and New Religious Sects > Four Noble Truths of Buddha > p. 43
3. [3] https://indianexpress.com/article/upsc-current-affairs/upsc-essentials/upsc-current-affairs-pointers-of-the-past-week-july-7-13-2025-10119853/