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': 'On exposure to sunlight which Vitamin is lost – \nSelect and explain. \nA. Vitamin A, B. Vitamin B1, C. Vitamin B6, D. Vitamin C', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]