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': 'Vaccine associated paralytic poliomyelitis is suspected if AFP develops within how many days of receipt of OPV? \nSelect and explain. \nA. 30, B. 45, C. 60, D. 90', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Vaccine associated paralytic poliomyelitis: Acute onset flaccid paralysis within 4 to 30 days of receipt of OPV or within 45 to 75 days of contact with a vaccine recipient and neurological deficits remaining 60 days after onset or death. Ref: Park 21st edition, page 105.', 'role': 'assistant'}]