<prompt> Nikolskys sign is positive in following conditions except:Pemphigus vulgarisToxic epidermal necrolysisEpidermolysis bullosaPemphigoid  <response>: Nikolskys Sign is seen in: Pemphigus vulgaris and foliaceous. Porphyria Sjogrens syndrome SSS TEN Lyells disease Epidermolysis bullosa congenita It occurs due to separation of epidermis from underlying dermis due to intraepidermal cleaving 