<prompt> A 24 years old middle aged female has flaccid bullae in the skin and persistent painful oral erosions palatal vestibular lesions in buccal mucosa. Histopathology shows intraepidermal acantholytic blister. The most likely diagnosis isBullous Pemphigoid.Erythema multiformePemphigus vulgaris.Dermatitis herpetiformis.  <response>: C i.e. Pemphigus vulgaris 