This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Storage of vaccines, Subject name: Pediatrics
[{'content': 'Which of the following vaccines is most sensitive to heat? \nSelect and explain. \nA. Oral Polio vaccine, B. BCG vaccine, C. DPT vaccine, D. Measles vaccine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: - Heat sensitive vaccines: OPV - most heat sensitive. Hence stored in freezer Reconstituted BCG Measles vaccine ***Note: For heat sensitivity: Reconstituted BCG > OPV > BCG -Light sensitive vaccines: Measles vaccine BCG Rota JE vaccine -Freeze sensitive vaccines: Hep B Pentavalent TT DPT vaccine', 'role': 'assistant'}]