This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Contracted Pelvis, Subject name: Gynaecology & Obstetrics
Deep transverse arrest occurs in which type of pelvis: 
Select and explain. 
A. Platypelloid, B. Gynecoid, C. Android, D. Anthropoid
C: Android
Answer: C: Android 
Explanation: Ref: Williams Obstetrics 23 rd ed pg.480,Dutta Textbook of Obstetrics 5th ed pg346Explanation:DEEP TRANSVERSE ARRESTArrest in occipito transverse position may be due to incomplete anterior rotation of oblique occipito posterior positionCauses:Pelvic architecture abnormalityAndroid pelvisDeflexion of headWeak uterine contractions Laxity of pelvic floorManagement:1. Caesarean section if big baby or inadequate pelvis2. If pelvis adequate, ventouse delivery, manual rotation and forceps application, forceps rotation and deliveryKielland forceps for rotationSimpson and Mclane forceps for head delivery