Bullous pemphigoidis characterized by

Bullous pemphigoid ischaracterized by non acantholytic blisters on trunk and limbs. . It is characterized by a negative Nikolsky’s 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