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: Dental
[{'content': 'Exanthems are caused by all except – \nSelect and explain. \nA. Malaria, B. Typhoid, C. Measles, D. Rubella', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Typhoid, measles and rubella cause morbillifonn exanthems.', 'role': 'assistant'}]