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: Skin
Sub-epidermal splitting is not found in: 
Select and explain. 
A. Bullous pemphigoid, B. Pemphigus foliaceus, C. Dermatitis herpetiformis, D. Burns
B: Pemphigus foliaceus
Answer: B: Pemphigus foliaceus 
Explanation: B i.e. Pemphigus foliaceous