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
Malleus and incus are derived from ? 
Select and explain. 
A. 1st Arch, B. 2nd Arch, C. 3rd Arch, D. 4th Arch
A: 1st Arch
Answer: A: 1st Arch 
Explanation: Ans. is 'a' i.e., 1st Arch