Widely known as GRG sir or GOGA sir, is a Guru of Pharmacology. He is MBBS, MD Pharmacology from UCMS Delhi and Ex-Assistant Professor, Department of Pharmacology, Maulana Azad Medical College. He is the most sought-after faculty amongst PGMEE/FMGE aspirants as well as under-graduate medical students for 18 years now. His books related to Pharmacology, Pathology and Genetics are pioneer books in their category for medical entrance exams in Southeast Asia and Beyond.