This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Incubation period of vaccine associated paralytic poliomyelitis is \nSelect and explain. \nA. 1-2 hours., B. 1-3 days, C. 7-10 days, D. 4-30 days', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Vaccine derived paralytic poliomyelitis (VAPP) : Develop paralytic polio after 4-30 days of administration of OPV Poliomyelitis among contacts of OPV : Develop within 7-60 days after exposure to recent OPV - recepient Ref: Human vital pathogens by Liu 1st edition Pgno : 79', 'role': 'assistant'}]