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': 'Which of the following trace element cannot be completely supplemented by diet in pregnancy - \nSelect and explain. \nA. Fe, B. Ca++, C. Zn, D. Manganese', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Iron in pregnancy Iron requirement per day in Non-pregnant woman: 1.6 mg per day Iron intake (suggested) per day in Non-pregnant woman: 21 mg per day Iron requirement per day in pregnant woman : 2.8 mg per day Iron intake (suggested) per day in pregnant woman: 35 mg per day. Iron content of IFA tablets in pregnancy : 100 mg per day. Total iron requirement in pregnancy : 1000mg Even if total iron is supplemented there is hemodilution and and loss of blood during pregnancy resulting in decreased fe content in body Ref: Park 25th edition Pgno : 674', 'role': 'assistant'}]