MS Chauhan is one of India's most respected names in the field of Organic Chemistry preparation for competitive exams like JEE and NEET. A Chemical Engineer from Mumbai University and Director of Vibrant Academy in Kota, Mahendra Singh Chouhan (often referred to as MSC Sir) has authored several best-selling textbooks that have become staples for students aiming for the Indian Institutes of Technology (IITs). Core Textbooks and Resources