This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Anatomy
[{'content': 'Assessment of progress of labour is best done by : \nSelect and explain. \nA. Station of head, B. Rupture of membranes, C. Contraction of uterus, D. Paogram', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Paograph is a graphical record of cervical dilatation and descent of head against the duration of labour in hours. It gives information about fetal and maternal condition which is recorded in a sheet of paper. Ref: Datta Obs 9e pg 122.', 'role': 'assistant'}]