Option c is the correct answer. Patanjali lived in the 2nd century BCE, during the reign of Pushyamitra Shunga, the founder of the Shunga dynasty that succeeded the Mauryan empire. This is evident from the references to Pushyamitra's military campaigns and victories in Patanjali's Mahabhashya. Pushyamitra Shunga ruled from 185 BCE to 149 BCE. He was also a contemporary of the Indo-Greek king Menander I, who invaded India and converted to Buddhism. Important Tips Patanjali was a famous grammarian and philosopher who wrote Mahabhashya, a commentary on Panini's Ashtadhyayi, the foundational text of Sanskrit grammar. Patanjali is also credited with the authorship of the Yoga Sutras, a treatise on the classical school of Yoga philosophy.