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
A 20 year old primigravida is admitted with-term pregnancy and labour pains. At 4.00 AM she goes into active labor. Membrance rupture during p/v exmination showing clear liquor. A repeat p/v examination after 4 hours of good uretine contractions reveals cervical dilataion of 5 cm. What should be the next step in management : 
Select and explain. 
A. Reassess after 4 hours, B. Immediate cesarean section, C. Oxytocin drip, D. Reassess for occipitoposterior position and cephalopelvic dispropoion
D: Reassess for occipitoposterior position and cephalopelvic dispropoion
Answer: D: Reassess for occipitoposterior position and cephalopelvic dispropoion 
Explanation: Reassess for occipitoposterior position and cephalopelvic dispropoion