'Milind Panho' is in the form of a dialogue between King Milind and Buddhist Saint. The concerned saint was -

The Milindapañha (Questions of Milinda) is a famous Buddhist text dating back to approximately 100 BCE. It is written in the form of a dialogue between the Indo-Greek King Menander I (known in Pali as Milinda) and the Buddhist sage Nagasena. The text covers various philosophical issues and Buddhist doctrines, eventually leading to the King's conversion to Buddhism. Menander I ruled a large kingdom in the northwestern part of the Indian subcontinent. Among the other options, Nagarjuna was a later Mahayana philosopher, Kumaril Bhatt was an 8th-century Mimamsa scholar, and Nagbhatt refers to rulers of the Gurjara-Pratihara dynasty.