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': 'What is the graphical record of cervical dilatation in centimeters against duration of labour in hours called ? \nSelect and explain. \nA. Paogram, B. Pictogram, C. Hysterograph, D. Amniograph', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Paogram', 'role': 'assistant'}]