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
The following statements are related to occipitoposterior except : 
Select and explain. 
A. Malrotation of occiput may cause occipitoacral arrest, B. 10% cases are associated with anthropoid or android pelvis, C. Incomplete forward rotation of occiput may cause deep transverse arrest, D. Non rotation of occiput may cause
B: 10% cases are associated with anthropoid or android pelvis
Answer: B: 10% cases are associated with anthropoid or android pelvis 
Explanation: Occipitoposterior position : In more than 50% of occipitoposterior position is associated with anthropoid or android pelvis Ref: Datta Obs 9e pg 343.