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
Skin over pinna is fixed: 
Select and explain. 
A. Firmly on both sides, B. Loosely on medial side, C. Loosely on lateral side, D. Loosely on both side
B: Loosely on medial side
Answer: B: Loosely 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.