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
Subepidermal bulla are seen in - 
Select and explain. 
A. Pemphigoid, B. Pemphigus, C. Pityriasis rosea, D. Psoriasis
A: Pemphigoid
Answer: A: Pemphigoid 
Explanation: A. i.e. Pemphigoid