<prompt> A 50 year old male presented with symptoms of cutaneous vasculitis, glomerulonephritis and synovitis. Which of the following investigations will be helpful in the diagnosis?P-ANCAC-ANCAAnti-HCV antibodyAnti-HAV antibody  <response>: Essential mixed cryoglobulinemia: Formation of immune complexes IgM -IgG Development of renal lesions and involvement of joints MPGN I and synovitis Most cases have been associated with hepatitis C virus infection. Deposits of IgG-IgM complexes induce Cutaneous vasculitis Synovitis MPGN 