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: ENT
1st Branchial cleft anomaly 
Select and explain. 
A. Amotia, B. Pre-Auricular sinus, C. Call-Aural fistulo, D. Absence of Tragus
C: Call-Aural fistulo
Answer: C: Call-Aural fistulo 
Explanation: None