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
[{'content': 'Sub-epidermal splitting is not found in: \nSelect and explain. \nA. Bullous pemphigoid, B. Pemphigus foliaceus, C. Dermatitis herpetiformis, D. Burns', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Pemphigus foliaceous', 'role': 'assistant'}]