This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Influenza, Subject name: Social & Preventive Medicine
[{'content': 'Which has lowest incubation period \nSelect and explain. \nA. Mumps, B. Influenza, C. Measles, D. Chicken pox', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) InfluenzaRef: K. Park 23rd ed. /153DISEASECAUSATIVE ORGANISMINCUBATION PERIODMUMPSRNA Myxo Virus14 to 21 daysINFLUENZAOrthomyxo Virus18 to 72 hoursMEASLES (RUBEOLA)RNA Para myxo Virus10 to 14 daysCHICKEN POXHuman Herpes Virus 314 to 16 days', 'role': 'assistant'}]