<prompt> Which of the following antibody is incriminated in causing henoch schonlein purpuraIgAIgMIgGIgD  <response>: Henoch schonlein purpuraIgA vasculitis is characterized by Paplable purpuramost commo buttocks and lower extremities Ahralgia Gastrointestinal signs and symptoms Glomerulonephritis Pathogenesis:immune complex deposition .IgA antibody class is the most often seen in immune complexes. Ref:Harrison 20th edition pg no 2586 