Which of the following cells help to fight against disease?

RBC

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WBC

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Platelets

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All of the above

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Solution

The correct option is B WBC
RBC's play an important role in gas transport, mainly of oxygen, but also carry some carbon dioxide.
WBC's have an important function in defense and immunity. They detect foreign or abnormal materials and destroy them through a range of defense mechanisms, thereby protecting the body from infections and diseases.
Platelets promote clotting of blood.
So, the answer is B.

Suggest Corrections

1. Tight junctions	i. Help cells communicate with each other
2. Gap junctions	ii. Provides anchoring function
3. Adherens junctions	iii. Prevent substances from leaking across the tissue