Select the most appropriate meaning of the underlined idiom in the given sentence.
Sirisha is sharp as a tack in her Mathematics class.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. mentally active.
Idiom: Sharp as a tack
Meaning: Very intelligent, quick-witted, or mentally alert.
Example: Even at the age of 90, her grandmother is sharp as a tack and remembers every detail.
Hence, the chosen option will be correct.