Concept: Ganita Saar Sangrah is an ancient Indian mathematical text. It was written by a Jain mathematician. Explanation: Mahaviracharya wrote "Ganita Sara Sangraha" in 850 AD. This book covers triangles, rhombus, circles, semicircles, and the method to find LCM. It also proves many theories from Aryabhata and Brahmagupta's works. Aryabhatta discovered zero and explained eclipses. Bhaskaracharya discovered gravity and used the decimal system. Brahmagupta gave the area formula for a cyclic quadrilateral. Answer: Mahaviracharya (Option C)