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': 'Cord compression causes _ deceleration : \nSelect and explain. \nA. Early, B. Late, C. Variable, D. None', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Variable', 'role': 'assistant'}]