<prompt> 40 yr old male presented with cirrhosis. Special stain used in the histology slide given below isAlcian bluePrussian blueMasson FontanaVon kossa  <response>: Iron in hemosiderin is chemically reactive and turns blue-black when exposed to potassium ferrocyanide, which is the basis for the Prussian blue stain. In iron-overloaded cells, most iron is stored in hemosiderin.Severe hemochromatosis hereditary or secondary is characterized principally by 1 deposition of hemosiderin in the following organs in decreasing order of severity the liver, pancreas, myocardium, pituitary gland, adrenal gland, thyroid and parathyroid glands, joints, and skin; 2 cirrhosis; and 3 pancreatic fibrosis.Ref: Robbins pathology 9e pg: 650, 848 