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
External auditory meatus develops from 
Select and explain. 
A. Dorsal part of 1st ectodermal cleft, B. Dorsal part of 2nd ectodermal cleft, C. Dorsal part of 3rd ectodermal cleft, D. Sixth branchial arch
A: Dorsal part of 1st ectodermal cleft
Answer: A: Dorsal part of 1st ectodermal cleft 
Explanation: None