Which of the following is NOT related to Indian mathematics ?

The correct option is Charak Samhita.

Step-by-Step Explanation:

1. Surya Siddhant: An ancient Indian text on astronomy and mathematics. It contains fundamental concepts of trigonometry including sine (jya) and cosine (kojya) functions, which played a crucial role in Indian mathematical history.

2. Baudhayan Sulba Sutra: One of the oldest geometry texts in India, written by Baudhayana. It contains early formulations of geometric rules, constructions of altars, and an early statement of what is widely known today as the Pythagorean theorem.

3. Lilavati: A treatise on arithmetic and practical mathematics written by the famous Indian mathematician Bhaskara II (Bhaskaracharya) in the 12th century. It covers topics like arithmetic operations, progressions, geometry, and combinations.

4. Charak Samhita: Unlike the other three texts, Charak Samhita is an ancient foundational text of Ayurveda (traditional Indian medicine) attributed to Maharishi Charaka. It focuses on medicine, human anatomy, diseases, diagnosis, and treatments, making it unrelated to Indian mathematics.

Therefore, Charak Samhita is NOT related to Indian mathematics.