Select the most appropriate option to fill in the blank.
It is never advisable to have an axe to ________.

Correct option is D

The correct option to fill in the blank is (d) grind.
Explanation: The idiom “to have an axe to grind” means to have a selfish motive or a personal reason for doing something (स्वार्थ / निजी मकसद रखना).
Example: He always helps others, but I feel he has an axe to grind.
Explain why other options are incorrect:
· Kill: To end life (मार डालना) – doesn’t fit idiomatically
· Rotate: To turn around a center (घुमाना) – irrelevant to idiom
· Replace: To take the place of something (बदलना) – unrelated to the idiom