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
[{'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 symphsis pubis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Vaginal delivery is not possible in Brow presentation Shoulder presentation Mentoposterior presentation of face', 'role': 'assistant'}]