Q. The Prasthanatrayi refers to the three canonical texts of Hindu philosophy on which Shankaracharya wrote his famous commentaries (Bhashyas). Which of the following are included in this triad?

1. The Upanishads
2. The Bhagavad Gita
3. The Brahma Sutras
4. Yoga Sutras

Select the correct option from the codes given below:
Answer: Only 1, 2 & 3
Notes: The Prasthanatrayi consists of the Upanishads (Sruti prasthana), the Bhagavad Gita (Smriti prasthana), and the Brahma Sutras (Nyaya prasthana). These three texts form the foundational authority for the Vedanta school of philosophy. The Yoga Sutras belong to the Yoga school, distinct from Vedanta, and hence are not part of the Prasthanatrayi.