The Navya Nyāya (new school of Indian logic) was established by Gangeśa Upādhyāya, who is considered the founder of this school.
- Gangeśa's work, it{Tattvachintāmaṇi} (The Jewel of Thought on the Truth), is a seminal text that formalized Navya Nyāya's logic and epistemology.
- Other figures such as Udayana and Jayanta Bhaṭṭa contributed significantly to Indian logic, but they were part of earlier schools of Nyāya.
- Gautama (Gotama) is the founder of the classical Nyāya school, not the Navya Nyāya school.
Thus, the correct answer is (C) Gangeśa.