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': 'Early deceleration pattern on cardiotocography indicates : \nSelect and explain. \nA. Head compression, B. Fetal distress, C. Cord prolapse, D. Hypoxia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Head compression', 'role': 'assistant'}]