Which of the following is an incorrectly matched word-meaning pair?

The words Intact and Tactful are an incorrectly matched word-meaning pair for the following reasons.
- The meaning of the word Intact is 'not damaged or impaired in any way'.
- The meaning of the word Tactful is 'have or showing skill and sensitivity in dealing with others or with difficult issues'.
Here we find that the word and its meaning do not correlate with each other in option 4 and is an incorrectly matched pair.
And therefore it is the correct answer.