Pharmacology Allopurinol prevents conversion of : a) Hypoxanthine to xanthine b) Xanthine to hypoxanthine c) Hypoxanthine to I.M.P. d) Xanthine to uric acid A ab B cd C ad D bd 💡 Explanation Allopurinol prevents conversion of : a) Hypoxanthine to xanthine b) Xanthine to hypoxanthine c) Hypoxanthine to I.M.P. d) Xanthine to uric acid ✓ Correct Answer: C. ad