<prompt>  A 30yearold male had severely itchy papulovesicular lesions on extremities, knees, elbows and buttocks for one year. Direct immunofluorescence staining of the lesions showed IgA deposition at dermo epidermal junction. The most probable diagnosis isPemphigus vulgarisBullous pemphigoidDermatitis herpetiformisNummular eczema 