Our blood appears red because of the presence of _________ in it.

Haemoglobin

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Platelets

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WBC

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None of the above

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Solution

The correct option is A Haemoglobin
Blood has four major components: plasma, red blood cells (RBCs), white blood cells (WBCs) and platelets.
Human blood is red because of the protein haemoglobin. It contains a red-coloured compound called heme that carries oxygen through the bloodstream.
Plasma is the liquid part of our blood. Platelets help our body to reduce the blood loss and entry of pathogens into the bloodstream during injury by forming a clot at the site of injury. WBCs are the defensive cells of our body that help to fight against foreign particles like bacteria, virus, fungi, etc.

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