Idiom
White blood cell act

For clotting blood
As a defence against infection
As a medium for oxygen transport from lung to tissues
As a source of energy

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Idiom
For each of the following sentences four alternatives are given. You are required to choose the correct meaning of the idiom or phrase given or underlined in the sentence. To give chapter and verse for a thing

To eulogize the qualities of a thing
To produce the proof of something
To attach artificial value to a thing
To make publicity of a thing

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