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': "Skeletal derivative of 2deg' pharyngeal arch - \nSelect and explain. \nA. Malleus, B. Incus, C. Stapes, D. Maxilla", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is `c' i.e., Stapes", 'role': 'assistant'}]