This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of External Ear, Subject name: ENT
Skin over pinna is: 
Select and explain. 
A. Firm on both sides, B. Loose on medial side, C. Loose on lateral side, D. Loose on both sides
B: Loose on medial side
Answer: B: Loose on medial side 
Explanation: Skin over the pinna is closely adherent to the perichondrium on the lateral surface while it is loosely attached on the medial surface.