Idiom
Nitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false?

By cyanobacteria
By electrical discharges in the atmosphere
By denitrification
By industrially synthesised fertilizer

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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 take the wind out of another's sails

To anticipate another and to gain advantage over him
To manouevre to mislead another on the high seas
To cause harm to another
To defeat the motives of another

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Idiom
To leave someone in the lurch

None of these
Constant source of annoyance to someone
To come to compromise with someone
To put someone at ease
To desert someone in his difficulties

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