<prompt> True about Henoch Schonlein purpura is -Medium vessels vasculitisRenal symptoms sta late in the disaeseIgA deposition in mesangiumLow Platelet count  <response>: Answer- C. IgA deposition in mesangiumHenoch - Schonlein purpura is vasculitis of small vessels capillaries, venule or aerioles and characterized by deposition of IgA in the wall of involved vessels.H.S. purpgra is characterized by tetrad of purpura ahritis glomerulonephritis, and abdominal pain.Diagnosis is confirmed by presence of palpable purpura with normal platelet count along with one or more of the following:abdominal pain, ahralgiaahritis and mesangial deposition of IgA. 