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': 'Drug which can cause Hyperophic Pyloric stenosis is: \nSelect and explain. \nA. Rifampicin, B. Erythromycin, C. Azithromycin, D. Ampicillin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Erythromycin', 'role': 'assistant'}]