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
Blisters coming on urticarial skin
A positive Nikolsky sign
Easily rupturing blisters
Acantholysis