This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Trivalent oral polio vaccine contains, type 3 virus- \nSelect and explain. \nA. 100,000 TCID 50, B. 200,000 TCID 50, C. 300,000 TCID 50, D. 400,000 TCID 50', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .oral polio vaccine contains live attenuated virus(type1,2,3) grown in monkey kidney cell cuture or human diploid cell culture.its given as a trivalent vaccine containing *300000 TCID 50 of type 1, *100000 TCID 50 of type 2 *300000 TCID 50 of type 3 virus per dose. ref:park&;s textbook,22 nd ed,pg 187', 'role': 'assistant'}]