Biochemistry Lesch – Nyhan Syndrome – associated with A Purine necleoside phosphorylase deficiency B Adenosine deaminase deficiency C Hypoxanthine - guanine phosphoribosyl transferase defect D Xanthine oxidase deficiency 💡 Explanation Lesch - Nyhan Syndrome - associated with ✓ Correct Answer: C. Hypoxanthine - guanine phosphoribosyl transferase defect