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

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Idiom
To wash one's dirty linen in public

To criticise one's nature in public
To discuss dirty and scandalous matters of personal nature in the presence of strangers
To quarrel in the open
To do some ugly work in public

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