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. Rohit has bitten off more than he chew.

Is always hungry
Has little regard for others
Is very greedy
Is trying to do much

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Idiom
White blood cell act

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

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