<prompt> A 24 years old female has flaccid bullae in the skin and oral erosions. Histopathology shows intraepidermal acantholytic blister. The most likely diagnosis isPemphigoidErythema multiformePemphigus vulgarisDermatitis herpetiformis  <response>: Flaccid bullaeMucosa involvedIntraepidermal acantholysis 