In the following questions, out of the four alternatives. select the alternative which best expresses the meaning of the idiom/phrase.
Leave no stone unturned.

Options

A. Search for the hidden treasure
B. Do a futile task
C. Be known for achieving a tremendous feat
D. Try every possible course of action in order to achieve something

Answer

D

Explanation

Leave no stone unturned =to do everything you can to achieve a good result.
Look at the sentence:
He left no stone unturned in his search for his natural mother.