The correct answer is option 2, Gautam. The `Nyaya Sutra` is a foundational text in the Hindu philosophy of logic and reasoning known as Nyaya. It was written by Gautam, who is considered the founder of the Nyaya School of thought. The Nyaya Sutra is a concise and systematic compilation of aphorisms that outline the principles and methods of logical reasoning. It covers various aspects of logic, including the means of acquiring knowledge, the rules of debate and argumentation, and the classification of different types of knowledge. Gautam`s work in Nyaya laid the groundwork for the development of logical thinking in Indian philosophy and had a significant influence on subsequent philosophers and scholars.