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': 'Dates are rich source of – \nSelect and explain. \nA. Calcium, B. Iron, C. Vitamin C, D. Carotene', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]