Which of the following is NOT one of the eight limbs of yoga described in Patanjali's Yoga Sutras?

The correct choice is Drishti, which is not one of the eight limbs of yoga as described in Patanjali's Yoga Sutras. The eight limbs serve as a guide to the practice of yoga and include Yama (ethical standards), Niyama (self-discipline), Asana (postures), Pranayama (breath control), Pratyahara (withdrawal of the senses), Dharana (concentration), Dhyana (meditation), and Samadhi (union or bliss).

Drishti, while an important aspect of yoga practice, particularly in meditation and physical postures, refers specifically to a gazing technique that helps focus the mind. It is beneficial for developing concentration and maintaining a sense of inner peace during practice but does not fall under the designated eight limbs outlined by Patanjali. Understanding this classification is essential for grasping the foundational structure of yoga philosophy.