<prompt> A 8 years old male had non blanching rashes over the skin and swelling of knee joint with hematuria and protein in urine. Microscopic analysis of his renal biopsy specimen is most likely to show:Tubular necrosisVisceral podocyte fusionMesangial deposits of IgABasement membrane thickening  <response>: c. Mesangial deposits of IgARef: Nelsons 20e p 1612, Ghai 8e p 632The given case scenario palpable purpura, arthritis, hematuria and proteinuria suggests a diagnosis of Henoch Schonlein purpuraIn H.S. purpura and IgA nephropathy, IgA deposits are present in mesangium by immunofluorescence 