Select the most appropriate option to fill in the blank.
At the sight of the police, the thief ran away in the ________ of an eye.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. “blink.”
The idiom in the sentence is:
“At the sight of the police, the thief ran away in the blink of an eye.”
The phrase “in the blink of an eye” is a well‑known English idiom meaning very quickly or instantly—just as fast as the time it takes to blink.
Why the other options are incorrect:
Option 1 ('sparkling') — Not used in idioms expressing speed.
Option 2 ('back') — Makes no sense with this context.
Option 4 ('core') — Irrelevant; not part of any common English idiom.