<prompt> Bullous pemphigoid is characterized byBlisters coming on uicarial skinA positive Nikolsky signEasily rupturing blistersAcantholysis  <response>: Bullous pemphigoid is characterized 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 bullous pemphigoid come on red uicarial base in the elderly population 