This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cutaneous Manifestations of Microvascular Occlusion Syndromes, Subject name: Skin
A person presents with hemorrhagic fluid in tense blister at dermoepidermal junction. Most probable diagnosis is? 
Select and explain. 
A. Pemphigoid, B. Pemphigus vulgaris, C. Pemphigus vegetans, D. Drug induced pemphigus
A: Pemphigoid
Answer: A: Pemphigoid 
Explanation: ANSWER: (A) PemphigoidREF: Rooks dermatology 7th ed p. 41.3-41.19Intraepidermal BullaBlister at Dertnoepidermal JunctionGranular layerJunctionalPemphigus foliaceousJunctional EBSubcorneal pustular dermatosisBullous pemphigoidStaphylococcal scalded skin syndrome Bullous pemphigoidDermolyticSpinous layerEpidermoiytic bullosa dystrophicansFamilial benign pemphigusEpidermolytic bullosa aquisticaSuprabasalDermatitis herpetiformisPemphigus vulgarisDarier s diseaseBasal layerErythema multiformeLupus erythematosusLichen planusEBSPemphigus vegetans is a localized form of pemphigus vulgarisThe most common variant of pemphigus associated with drug exposure is pemphigus foliaceus, although pemphigus vulgaris has also been described