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': 'The daily requirement of Vitamin C is – \nSelect and explain. \nA. 40 mg, B. 100 mg, C. 200 mg, D. 500 mg', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]