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
In brow presentation, presenting diameter is/are : 
Select and explain. 
A. Submentoveical, B. Occipitofrontal, C. Mentoveical, D. Suboccipitobregmatic
C: Mentoveical
Answer: C: Mentoveical 
Explanation: Ans. is c i.e. Mentoveical Brow Presentation : Causes of brow presentation are same as for face presentation. Most common cause -- Flat pelvis. Engaging diameter -- Mentoveical (14cm). There is no mechanism of labour. Diagnosed on P/V by palpating supra orbital ridges and anterior fontanelle. Delivery is by cesarean section.