<prompt> Which of the following presents with a string of pearl appearance?Pemphigus vulgarisBullous pemphigoidLinear IgA diseaseDermatitis herpetiformis  <response>: The lesions in Linear IgA disease with a bimodal age distribution ie 60 yrs comprise of uicated plaques and papules, and annular, polycyclic lesions often with blistering around the edge, the string of pearls signcluster of jewels sign. 