This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
[{'content': 'Dates are rich source of - \nSelect and explain. \nA. Calcium, B. Iron, C. Vit C, D. Carotene', 'role': 'user'}, {'content': "Answer: A \nExplanation: In dates calcium present is 120mg,vitamin C is 3,carotene is 44mg per 100mg of datesREF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 581", 'role': 'assistant'}]