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': 'Vaccine which should not be frozen - \nSelect and explain. \nA. OPV, B. Measles, C. HBV, D. Yellow fever', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., HBV OPV and measles vaccines are stored in deep freezers. (Note : Yellow fever vaccine is also freez dried, but is not used in India). Vaccine which must be stored in the cold pa but never allowed to freez. Typhoid DPT TT Hepatitis B DT BCG Diluents", 'role': 'assistant'}]