Question

Select the correct meaning of the idiom written in capital letters in given sentence: The dectective LEFT NO STONE UNTURNED to trace the culprit.

I) did not use all available means.

II) did very irrelevant things

III) took no pains

IV) did one's best.​

Answer 1

Answer:

IV) Did one's best.

Another example- I left no stone unturned to write this exam.