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': 'Under AFP Surveillance, follow-up examination is done after \nSelect and explain. \nA. 15 days of onset of paralysis, B. 33 days of onset of paralysis, C. 60 days of onset of paralysis, D. 93 days of onset of paralysis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 60-day follow-up in a case of Acute Flaccid Paralysis (AFP) :\nThe District Immunization Officer (DIO) must visit every case of AFP 60 days after onset of paralysis ‘to confirm the presence or absence of residual weakness’ – Activity completed before 70th day.', 'role': 'assistant'}]