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
Which of the following is a subepidermalvesiculobullous disorder? 
Select and explain. 
A. Pemphigus vulgaris, B. Bullous pemphigoid, C. Pemphigus vegetans, D. Pemphigus erythematosus
B: Bullous pemphigoid
Answer: B: Bullous pemphigoid 
Explanation: Ans. is 'b' i.e., Bullous pemphigoid