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
[{'content': 'Forceps should NOT be used in: \nSelect and explain. \nA. Twin delivery, B. Hydrocephalus, C. Post maturity, D. After coming head of breech', 'role': 'user'}, {'content': 'Answer: B \nExplanation: As discussed previously—\nOne of the criteria to be fulfilled before applying forceps is—there should be no major cephalopelvic disproportion (CPD) by clinical pelvimetry and hydrocephalus is an important cause of CPD.\nDutta Obs. 7/e, p 352', 'role': 'assistant'}]