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. The detective left no stone unturned to trace the culprit.

resorted to illegitimate practices
took no pains
used all available means
did very irrelevant things

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Idiom
To stand to one's guns

To persevere when hardships press
To keep the guns close to oneself even amid danger
To maintain dignified and unbending attitude
To maintain one's position

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