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
Forceps should not be used in : 
Select and explain. 
A. Twin delivery, B. Hydrocephalus, C. Postmaturity, D. After coming head of breech
B: Hydrocephalus
Answer: B: Hydrocephalus 
Explanation: One of the criteria before applying forceps - There should be no major cephalopelvic dispropoion by clinical pelvimetry Hydrocephalus is a most common cause of CPD. Ref: Dutta Obs 9e pg 533.