Which component of blood causes a positive reaction in the kastle-meyer test and the luminol test?

The Kastle- Meyer and Luminol tests are presumptive tests for the identification of blood. The Kestle- Meyer test utilizes the phenophthalein solution and hydrogen perioxide as reagents which reacts with the hemoglobin pigment of the blood. The phenophthalien is colourless dye but in the presence of hemoglobin it gives of pink color. The pink color indicates the presence of blood. The Luminol is the reagent that gives of green fluorescence in the presence of blood also the hydrogen perioxide is used as an oxidizing agent of the reaction. These ingredients also reacts with the hemoglobin component of the blood to give off green fluorescence.

The hemoglobin component of the blood causes a positive reaction in the  Kastle-Meyer test and the Luminol test.

the answer to your question is b

i think that d. wind is the answer.   i missed the question when i answered a. currents.