He quits the country _____ his will.

1. On
2. By
3. For
4. To

The correct answer is actually “against,” though not listed. “Against his will” is the standard idiomatic expression meaning doing something despite one’s desire or consent. If forced to choose from the given options, none are fully correct. However, in some contexts, “by his will” would mean according to his wishes, which is opposite. “For his will” and “to his will” are not idiomatic.