<prompt> Bullous pemphigoidis characterized byBlisters coming on urticarial skinA positive Nikolsky signEasily rupturing blistersAcantholysis  <response>: Bullous pemphigoid ischaracterized by non acantholytic blisters on trunk and limbs. .It is characterized by a negative Nikolskys sign, so B is incorrect.Blisters of bullous pemphigoid are tense and not at all easily ruptured, so C is incorrect.Typical tense blisters of BP come on red urticarial base in elderly population 