The conversation between Nagasena and Menander-I related to Buddhism is recorded in the book Milindapanho.

The Milindapanho, also known as the "Questions of King Milinda," is a Buddhist text in the Pali Canon. It is a dialogue between the Greek king Menander-I, also known as Milinda, and the Buddhist monk Nagasena. The text is written in the form of a dialogue, where King Milinda poses questions to Nagasena, and Nagasena provides insightful answers.

Content:
The Milindapanho consists of several chapters, each dealing with different philosophical and doctrinal aspects of Buddhism. The dialogue covers a wide range of topics, including the nature of self, the existence of the soul, the concept of karma, the nature of enlightenment, and the path to liberation.

Significance:
The conversation between Nagasena and Menander-I is significant for several reasons. Firstly, it showcases the ability of Buddhism to engage with different cultures and philosophical traditions. Menander-I was a Greek king who ruled in the northwestern region of the Indian subcontinent, and his dialogue with Nagasena represents an encounter between Greek and Buddhist thought.

Secondly, the dialogue provides valuable insights into Buddhist philosophy and teachings. Nagasena's answers shed light on key concepts such as anatta (non-self), karma, and the Four Noble Truths. Through his explanations, Nagasena helps King Milinda grasp the profound wisdom of Buddhism and understand the path to liberation.

Lastly, the Milindapanho serves as a record of Buddhist thought and philosophy during the time it was composed. It provides valuable historical and cultural information about the interaction between Buddhism and other traditions in ancient India.

Conclusion:
In conclusion, the conversation between Nagasena and Menander-I related to Buddhism is recorded in the book Milindapanho. This dialogue between the Greek king and the Buddhist monk not only highlights the ability of Buddhism to engage with different cultures but also provides valuable insights into Buddhist philosophy and teachings. The Milindapanho serves as a significant record of Buddhist thought and philosophy during the time it was composed.