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': 'Bivalent oral polio vaccine contains which strains of polio virus- \nSelect and explain. \nA. 1 8c 2, B. 2 & 3, C. 1 & 3, D. 3 & 4', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 1 & 3 * Bivalent oral polio vaccine (BOPV) contains suspension of type 1 and type 3 attenuated Polio viruses (Sabin strains), prepared in primary monkey kidney cell.* Trivalent OPV contains type 1, 2 & 3 attenuated polioviruses. It contains:-i) Over 300,000 TCID 50 of type 1 poliovirusii) Over 100,000 TCID 50 of type 2 poliovirusiii) Over 300,000 TCID 50 of type 3 poliovirus", 'role': 'assistant'}]