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. A fool's errand

None of these
An impossible task
A blunder
A useless undertaking

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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. At one's beck and call

To be always at one's service
To be under one's subjugation
Enjoying oneself without caring for others
To be in an advantageous position

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