<prompt> Congo-red with amyloid produces -Dark brown colourBlue colourBrilliant pink colourKhaki colour  <response>: HARSH MOHAN TEXTBOOK OF PATHOLOGY SEVENTH EDITION Page no :67 By HE staining amyloid appears as extracellular homogenous structureless eosinphilc material ; it stains positive with congo red staining and show apple gringe bitefringes on polarising microscopy 