Direct immunofluorescence(DIF) is negative in:: (A) Bullous Pemphigoid, (B) Cicatricial pemphigoid, (C) Epidermolysis Bullosa Dystrophica, (D) Pemphigus Folaceous
Answer is C. All of the above are autoimmune disorders except Epidermolysis Bullosa Dystrophica which is because of defective collagen.7 in dermis and hence DIF is negative.