Forceps should not be used in :: (A) Twin delivery, (B) Hydrocephalus, (C) Postmaturity, (D) After coming head of breech
Answer is B. 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.