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': 'The best drug for treatment of IUGR is: \nSelect and explain. \nA. Aspirin, B. Nitric oxide donors, C. Anti oxidants, D. None of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None of the above', 'role': 'assistant'}]