Correct option is A
The correct answer is
(a) Useless search.
Wild Goose Chase: A pointless or hopeless search for something that is difficult or impossible to find.
Wild Goose Chase in Hindi: व्यर्थ की खोज।
Example: Searching for his lost ring in the forest was a wild goose chase.
Other Related Idioms:
1.
Barking up the wrong tree →
Meaning: Looking for something in the wrong place.
Example: If you think I stole your book, you're barking up the wrong tree.
2.
A fool’s errand →
Meaning: A pointless task.
Example: Trying to fix the old radio was a fool’s errand.
3.
Needle in a haystack →
Meaning: Something extremely difficult to find.
Example: Finding my lost earring in the beach sand was like finding a needle in a haystack.
4.
Running around in circles →
Meaning: Making no progress despite efforts.
Example: Without a proper plan, we are just running around in circles.