This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Most common cause of death in measles is \nSelect and explain. \nA. Pneumonia, B. Meningitis, C. Dehydration, D. Encephalitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]