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: Anatomy
[{'content': 'Smiling and frowning are actions produced by the following nerves: \nSelect and explain. \nA. Mastication; trigeminal (V cranial), B. Mastication; facial (VII cranial), C. Facial expression; trigeminal (V cranial), D. Facial expression; facial (VII cranial)', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]