Idiom
It is an oxygen carrying protein of red colour concentrated in red blood cells.

Haemoglobin
Actin
Gastrin
Insulin

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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 keep the wolf away from the door

To keep alive
To keep away from extreme poverty
To hold the difficulties and dangers in check
To keep off an unwanted and undesirable person

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