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
Which of the following is a subepidermal vesiculobuilous 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 1 Immunohuilous disorders due to autoimmunity (also called primary blistering disease)A) IntraepidermalB) Subepidermalo Pemphiguso Bullous pemphigoid# Pemphigus vulgariso Dermatitis herpatiformis# Pemphigus foliaceouso Epidermolysis bullosa acquisita# Pemphigus vegetans # Pemphigus erythematosus 2 Mechanobullous disorders (due to defect in structure and organization of epidermis or dermoepidermal junction)o Epidermolysis bullosao Bullous ichthyosiform erythroderma3.Other disorders1. Infections - VZV, HSV, Bullous impetigo. Staphylococcus scalded skin syndrome2. Metabolic - Porphyria. Diabetes. Hemodialysis3. Drug eruptions - Fixed drug eruption, Stevens-johnson syndrome, Erythema multiforme.