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: Unknown
[{'content': 'Face to pubes delivery is possible with which cephalic presentation - \nSelect and explain. \nA. Mento-anterior, B. Mento-posterior, C. Occipito sacral, D. Brow presentation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans-C', 'role': 'assistant'}]