15 Select the correct answer.
Which of the blood reagent tests result in a blue-green color when it touches blood?
OA Phenolphthalein
O B. Luminol
OC. Fluoresceln
OD HemaStix
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The correct answer is - D. Hemastix

Explanation:

HemaStix is a blood reagent test to test the blood present in a sample with the help of strips of tetramethylbenzidine and hydrogen peroxide. It is a presumptive color test. A presumptive color test that detects blood.

In this test, the plastic pad of TMB and hydrogen peroxide gets a sample from a wet swab, initially, it gives yellow color but if there is blood and it touches with blood it will turn green or blue-green. It does not require to destroy the DNA of the blood cells.

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"d.) carbon dioxide and hydrogen sulfide"