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 which fetal presentation vaginal delivery can be expected: \nSelect and explain. \nA. Face presentation when the chin lies direct to the sacrum, B. Brow presentation, C. Shoulder presentation, D. Face presentation when the chin lies under the symphysis pubis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Vaginal delivery is not possible in:\n\nBrow presentation\nShoulder presentation (transverse lie)\nMentoposterior presentation of face (i.e. when chin lies directed to sacrum)\n\nIn mentoanterior, i.e when chin lies under the symphysis pubis – vaginal delivery is possible.', 'role': 'assistant'}]