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': 'In heart disease, prophylactic forceps is applied at head station of: \nSelect and explain. \nA. -1, B. 1, C. 0, D. 2', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In heart disease forceps are applied prophylactically to cut down the second stage of labour and usually low or outlet forceps applied.\n\nLow forceps: Applied when leading point of fetal scalp is at station + 2 and not on pelvic floor.\nOutlet forceps: Applied when fetal skull has reached pelvic floor and scalp is visible at the introitus even without separating the labia, i.e. station ≥ + 3', 'role': 'assistant'}]