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': 'Abruption of placenta occurs in all EXCEPT \nSelect and explain. \nA. Smokers, B. Folic acid deficiency, C. Alcoholics, D. PIH', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Alcoholics', 'role': 'assistant'}]