Answer:
(c) Madhyama-vyayoga
Explanation:
Bhasa was an ancient Indian playwright, and "Madhyama-vyayoga" is one of the plays attributed to him. The other options are not attributed to Bhasa: "Kavyalankara" is a work on poetics, "Natyashastra" is attributed to Bharata Muni, and "Mahabhashya" is attributed to Patanjali.
