In brow presentation, presenting diameter is/are :
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.
Submentoveical
Occipitofrontal
Mentoveical
Suboccipitobregmatic