This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastro-Intestinal Tract, Subject name: Pharmacology
[{'content': 'Ranitidine differs from cimetidine in the following respect:- \nSelect and explain. \nA. It is less potent, B. It is shoer acting, C. It does not have anti-androgenic action, D. It produces more CNS side effects', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cimetidine is rarely used now because: It is the least potent H2 blocker It is a sho acting agent It is a potent inhibitor of microsomal enzymes It can cause gynaecomastia It produces more CNS adverse effects', 'role': 'assistant'}]