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. VitC, D. Carotene', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' Calcium", 'role': 'assistant'}]