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. I am afraid the two brothers are at cross purposes.

are misunderstanding each other
dislike each other
quarrel with each other
are working against each other

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Idiom
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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