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: Social & Preventive Medicine
[{'content': 'Shoest incubation period is of which infection ? \nSelect and explain. \nA. Chicken pox, B. Measles, C. Rubella, D. Influenza', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Influenza", 'role': 'assistant'}]