Which one of the following is a work attributed to playwright Bhasa?

The correct answer is (C) Madhyama-vyayoga. Here's why:

* Bhasa was an ancient Indian playwright believed to have predated Kalidasa. He is known for his Sanskrit plays, often characterized by their dramatic intensity and focus on emotions.

* Madhyama-vyayoga (meaning 'The Middle One') is one of Bhasa's famous plays. It's part of a trilogy and tells a story from the Mahabharata.

_Let's look at the other options:_

* Kavyalankara is a work on Sanskrit poetics by the renowned scholar Bhamaha.

* Natyashastra is the foundational text on Indian classical dance and drama, attributed to the sage Bharata Muni.

* Mahabhashya is a comprehensive commentary on the Sanskrit grammar of Patanjali, based on Panini's Ashtadhyayi.