This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NPEP, NHM, Subject name: Social & Preventive Medicine
[{'content': 'Under National Poliomyelitis Elimination Programme, Poliomyelitis is diagnosed by:- \nSelect and explain. \nA. Antibodies titre rise in blood, B. Viral isolation in stool, C. Viral microscopy in stool, D. Clinical examination', 'role': 'user'}, {'content': "Answer: B \nExplanation: Polio virus diagnosis in India: Is done by Viral culture and isolation from Stool Samples collected from cases of Acute Flaccid Paralysis (AFP) Previously it was done through 'Antibody titre rise'. 2 stool samples b/w 24-48hrs each weighing 8gm is taken & sent it to lab through reverse cold chain.", 'role': 'assistant'}]