Topic: Miscellaneous (Others Question of English Grammer),

Best Answer Explained in Below-:

The phrase "Better late than never" is a common English expression that conveys the idea that it is preferable to do something late than not do it at all. In this context, the word "never" serves as the logical antithesis of the action being discussed. By completing the phrase with "never," we emphasize that even if something is delayed, it is still better to take action than to forgo it entirely.

The other options—"ever," "whatever," and "however"—do not fit the conventional meaning of the idiom. For instance, "better late than ever" lacks the authoritative tone of the original saying and implies a less decisive stance on timeliness. "Whatever" introduces ambiguity and detaches from the specific lesson surrounding punctuality and opportunity. "However" suggests alternative considerations, which diverges from the straightforward moral of accepting delays.

Thus, "never" perfectly encapsulates the essence of the phrase, conveying the notion that proactive efforts, albeit delayed, are preferable to inaction, making it the correct choice.