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 :
Reassess after 4 hours Immediate cesarean section Oxytocin drip Reassess for occipitoposterior position and cephalopelvic dispropoion