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': 'Requirement of calcium in pregnancy is (in mg/ day): March 2013 (d, e, h) \nSelect and explain. \nA. 600, B. 800, C. 1000, D. 1200', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D i.e. 1200 The current RDA for calcium intake during pregnancy and lactation is 1,200 mg/day.', 'role': 'assistant'}]