This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Which is not a S/E of Cimetidine ? \nSelect and explain. \nA. Impotence, B. Gynaecomastia, C. Atrophic gastritis, D. Galactorrhea', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Atrophic gastritis", 'role': 'assistant'}]