<prompt> Iron in tissues is stained with which of the following stains?Sudan OPrussian BluePASNone of the above  <response>: Iron pigment appears as a coarse, golden, granular pigment lying within the cells cytoplasm. It can be visualized in tissues by the Prussian blue histochemical reaction, in which colorless potassium ferrocyanide is conveed by iron to blue-black ferric ferrocyanide. Ref: Robbins, 8th edition, Chapter 1. 