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. Some people have a habit of wearing their heart on their sleeve.

avoiding being friendly with others
exposing their innermost feelings to others
saying something which is not to be taken seriously
wasting their time on unnecessary details

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Idiom
White blood cell act

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

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