Option c is the correct answer. Nagasena was a Buddhist monk and scholar who lived in the 2nd century BC. He is famous for his dialogue with King Menander I, also known as Milinda, who was an IndoGreek ruler of a large empire in northwestern India. The dialogue is recorded in the Milindapañha, a Buddhist text that dates from sometime between 100 BC and 200 AD . The Milindapañha covers various topics of Buddhist doctrine and practice, such as the nature of the self, karma, rebirth, nirvana, meditation, ethics, and logic. It is written in a lively and engaging style, using parables, analogies, and stories to illustrate the points. The Milindapañha is regarded as a canonical text by the Burmese Theravada tradition, and as a valuable source of information by other Buddhist school.