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': 'A 20 year old primigravida is admitted with full term pregnancy and labour pain. At 4 am she goes into active phase of labour with 4 cm cervical dilatation. Membranes rupture during p/V examinatin showing clear liquor. A repeat PN examination after 4 hours of good uterine contraction reveals a cervical dilatation of 5 cm. What should be the next step in management : \nSelect and explain. \nA. Reassess after 4 hours, B. Immediate cesarean section, C. Oxytocin drip, D. Reassess for occipito posterior position and cephalopelvic dispropoion', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Reassess for occipito posterior position and cephalopelvic dispropoion', 'role': 'assistant'}]