Select the most appropriate meaning of the given idiom.
At one’s fingertips
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. To have complete knowledge.
The idiom "at one's fingertips" means having something readily available or easily accessible. It can also imply that someone has extensive knowledge or information on a particular subject that they can quickly recall or use.
Therefore the correct option is "to have complete knowledge".