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': 'Why are the following vaccine ls coloured? \nSelect and explain. \nA. For easy recognition of these vaccines, B. Because they are live vaccines, C. Because these vaccines are light sensitive vaccines, D. Because thes vaccines are darker in colour', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Light sensitive vaccines: - These vaccine lose their potency if exposed to bright light - Thus, these vaccines are packed in dark brown glass for protection - BCG, Measles, JE, Rotavirus are light sensitive vaccines', 'role': 'assistant'}]