This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abnormal labor, Subject name: Anatomy
In case of direct occipito posterior position most commonly encountered problem is 
Select and explain. 
A. Intracranial injury, B. Cephalhematoma, C. Paraurethral tears, D. Complete perineal tears
D: Complete perineal tears
Answer: D: Complete perineal tears 
Explanation: In face to pubis delivery the most common complication is perineal tear as the occiput is posterior and thus the longer biparietal diameter distends the perineum rather than the smaller bitemporal diameter.Hence in all such cases liberal episotomy should be given