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': 'The facial muscle for facial expression of frowning: \nSelect and explain. \nA. Zygomaticus major, B. Corrugator supercili and procerus, C. Dilator naris and depressor septi, D. Depressor anguli oris', 'role': 'user'}, {'content': 'Answer: B \nExplanation: A few of the common facial expressions and the muscles producing them are\ngiven below.\n1. Smiling and laughing: Zygomaticus major\n2. Sadness: Levator labii superioris and levator anguli oris\n3. Grief: Depressor anguli oris\n4. Anger: Dilator naris and depressor septi\n5. Frowning: Corrugator supercilli and procerus\n6. Horror, terror and fright: Platysma\n7. Surprise: Frontalis\n8. Doubt: Mentalis\n9. Grinning: Risorius\n10. Contempt: Zugomaticus minor\n11. Closing the mouth: Orbicularis oris\n12. Whistling: Buccinator, and orbicularis oris', 'role': 'assistant'}]