Step 1: Concept of Pramāṇa.
Pramāṇa means the primary means or valid path to knowledge. According to different philosophical schools (Darśana), these may vary. For instance, Nyāya accepts 4 pramāṇas, while Mīmāṁsā and Vedānta accept even more.
Step 2: Buddhist Perspective.
In Buddhist philosophy (Bauddha darśan), only two pramāṇas are accepted:
1. Pratyakṣa (Direct perception)
2. Anumāna (Inference)
Step 3: Why only two?
Buddhist thought emphasizes experience and logic. They do not accept Śabda (testimony), upamā (analogy), or arthāpatti (postulation) as independent pramāṇas.
Step 4: Analysis of options.
(1) Only one Pramāṇa: Incorrect, as two are accepted.
(2) Four Pramāṇas: This is according to Nyāya, not Buddhism.
(3) Two Pramāṇas: Absolutely correct, Pratyakṣa and Anumāna.
(4) Three Pramāṇas: Not accurate.
Step 5: Conclusion.
The correct answer to this question is—two Pramāṇas.