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: Gynaecology & Obstetrics
[{'content': 'Proved to be effective in the management of preeclampsia: \nSelect and explain. \nA. Zinc, B. Calcium, C. Magnesium, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Drugs used in Prophylaxis of Preeclampsia:\n\nLow dose aspirin: Calcium: Role +/– Folic acid supplementation. Antioxidants–Vitamin C, Vitamin E, and Lycopene', 'role': 'assistant'}]