This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Scutum is present in 
Select and explain. 
A. Roof, B. Lateral wall, C. Anterior wall, D. Posterior wall
B: Lateral wall
Answer: B: Lateral wall 
Explanation: The scutum in the ear is a sharp bony spur formed by the superior wall of the external auditory canal and the lateral wall of the tympanic cavity. REF.BDC VOL.3,SIXTH EDITION