In a case of direct occipito-posterior position (face to pubis delivery) most commonly encountered problem is:

Ans. is d, i.e. Complete perineal tearsRef. Dutta Obs. 7/e, p 370In face to pubis delivery - the most common complication is perineal tear as the occiput is posterior and thus the longer biparietal diameter (9.4 cm) distends the perineum rather than the smaller bitemporal diameter (8 cm). Hence in all such cases liberal episiotomy should be given.