The end product of the technique shown in the image is which compound?

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Multiple Choice

The end product of the technique shown in the image is which compound?

Explanation:
The main concept is that this staining reaction creates a blue pigment when ferric iron is present in tissue. In the Perls’ Prussian blue stain, ferric iron (Fe3+) reacts with potassium ferrocyanide under acidic conditions to form ferric ferrocyanide, which appears as Prussian blue. That blue precipitate marks where iron is located, such as in hemosiderin-containing cells. So the end product shown is Prussian blue. The other options wouldn’t produce this blue pigment in this context—eosin would give pink/red staining, DAB yields a brown product, and iron hematoxylin is a different staining combination with a different color outcome.

The main concept is that this staining reaction creates a blue pigment when ferric iron is present in tissue. In the Perls’ Prussian blue stain, ferric iron (Fe3+) reacts with potassium ferrocyanide under acidic conditions to form ferric ferrocyanide, which appears as Prussian blue. That blue precipitate marks where iron is located, such as in hemosiderin-containing cells. So the end product shown is Prussian blue. The other options wouldn’t produce this blue pigment in this context—eosin would give pink/red staining, DAB yields a brown product, and iron hematoxylin is a different staining combination with a different color outcome.

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