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': 'Chorionic villous sampling done before 10 weeks may results in : \nSelect and explain. \nA. Fetal less, B. Fetomaternal hemorrhage, C. Oromandibular limb defects, D. Sufficient material not obtained', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Oromandibular limb defects', 'role': 'assistant'}]