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
Bullae of bullous pemphigoid are ? 
Select and explain. 
A. Intraepiderma, B. Subepidermal, C. Subepidermal, D. None
B: Subepidermal
Answer: B: Subepidermal 
Explanation: Ans. is 'b' i.e., Subepidermal Intra-epidermal immunobullous disorder Sub-epidermal immunobullous disorder Pemphigus vulgaris Bullous pemphigoid Pemphigus vegetan Mucous memb. Pemphigoid Pemphigus foliaceu Pemphigoid gestationalis Pemphigus foliaceu Linear IgA disease Intercellular IgA dermatosis Epidermolysis bullosa aquisita Paraneoplastic Pemphigus Dermatitis herpetiformis