The correct answer is (b).
The Majjhima Nikaya is a collection of 152 suttas (discourses) attributed to the Buddha. It is one of the five nikayas (collections) of the Sutta Pitaka, the first part of the Buddhist canon. The Majjhima Nikaya is the second-largest nikaya, after the Digha Nikaya.
The Majjhima Nikaya is written in the Pali language, which is a Middle Indo-Aryan language. Pali is the language of the Theravada tradition of Buddhism.
Sanskrit is an ancient Indo-Aryan language that was used in India for religious and literary purposes. It is the language of the Vedas, the Upanishads, and the Mahabharata.
Prakrit is a group of Middle Indo-Aryan languages that were spoken in India from the 6th century BCE to the 6th century CE. Prakrit is the language of the Jataka tales and the plays of Kalidasa.
Telugu is a Dravidian language that is spoken in India and Sri Lanka. Telugu is the official language of the Indian state of Andhra Pradesh.