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': 'Variable decelerations on electronic fetal monitoring in a woman who is in labour indicates : \nSelect and explain. \nA. Congenital hea disease, B. Compression of head, C. Administration of sympathomimetic drugs to the mother, D. Umbilical cord compression', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Umbilical cord compression', 'role': 'assistant'}]