Idiom
The main function of heamoglobin is

Control Blood Pressure
None of these
Produce hormones
Carries Oxygen

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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. He is in the habit of fishing in troubled waters.

putting others in trouble
indulging in evil conspirancies
aggravating the situation
taking advantage of troubled conditions for personal profit

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