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': '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: Ans. is 'c' i.e., 300,000 TC1D 50 Oral (sabin) polio vaccineo It contains live attenuated vimss (type 1, 2 and 3) grown in primary' monkey kidney or human diploid cell culture,o The vaccine containsOver 300.000 TCID 50 of type / poliovirusOver 100,000 TCID 50 of type 2 poliovirusOver 300,000 TCID 50 of type 3 polioviruso Dose - 2 drop (0.1 ml)o Schedule in National Immunization Programme of India.DoseAgeOPV-O (Zero dose)At birthOPV-1OPV-26 weeks10 weeksOPV-314 weeksOPV-B (Booster dose)16-24 monthso Development of immunity - OPV induces local intestinal immunity by production of secretory- IgA as well humoral immunity by inducing production of serum antibodies (IgG). So, it gives protection from paralysis and also prevents infection of the gut by wild viruses.", 'role': 'assistant'}]