This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pemphigoid Group, Subject name: Skin
Bullae of bullous pemphigoid are - 
Select and explain. 
A. Intraepidermal, B. Subepidermal, C. Subdermal, D. None
B: Subepidermal
Answer: B: Subepidermal 
Explanation: Ans. is 'b' i.e., SubepidermalIntra-epidermal immunobullous disorderSub-epidermal immunobullous disorder1. Pemphigus vulgaris1. Bullous pemphigoid2. Pemphigus vegetan2. Mucous memb. Pemphigoid3. Pemphigus foliaceu3. Pemphigoid gestationalis4. Pemphigus erythmatosus4. Linear IgA disease5. Intercellular IgA dermatosis5. Epidermolysis bullosa aquisita6. Paraneoplastic Pemphigus6. Dermatitis herpetiformis