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': 'Normal paogram include the following except : \nSelect and explain. \nA. Cervical dilatation in X - axis, B. Descent of head in Y - axis, C. Sigmoid shaped curve, D. Ale line followed 4 hours later by action line', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cervical dilatation in X - axis', 'role': 'assistant'}]