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': 'In aificial rupture of membrane , fetal hea shows : \nSelect and explain. \nA. Acceleration, B. Deceleration, C. Variable deceleration, D. Any of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Variable deceleration', 'role': 'assistant'}]