Fill in the blank with the most appropriate option.
A modest man does not boast _______ his merits.

Correct option is C

The correct option to fill in the blank is (c) of.
Explanation: The correct phrase is “boast of,” which means to speak with pride about something.
Example: He boasts of his achievements all the time.
Why other options are incorrect:
· (a) on: Incorrect with “boast.”
· (b) about: Common in informal use but “boast of” is grammatically standard.
· (d) over: Not used with “boast.”
�� Information Booster: “Boast of/about” is used to talk proudly about achievements. “Boast” is followed by “of” in formal English.