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': 'Malleus and incus are derived from ? \nSelect and explain. \nA. 1st Arch, B. 2nd Arch, C. 3rd Arch, D. 4th Arch', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 1st Arch", 'role': 'assistant'}]