Pathology Principle of Prussian blue stain: A Ferrous to ferricyanide B Ferrocyanide to ferroferric cyanide C Ferroferriccyanide to ferrocyanide D Ferrocyanide to ferricferrocyanide 💡 Explanation Principle of Prussian blue stain: ✓ Correct Answer: B. Ferrocyanide to ferroferric cyanide