Select the most appropriate option that can substitute the highlighted segment in the given sentence.
Ramesh is fond at playing guitar in his free time.

Correct option is D

The correct substitution of the highlighted words is (d) of.
Explanation:
· The phrase "fond of" is a standard English expression meaning "having a liking for something."
· The preposition "at" is incorrect here because "fond" is always followed by "of" when expressing preference or liking.
Grammatical Rule Used:
· Certain adjectives like "fond," "afraid," "tired," and "proud" require "of" before a noun or gerund (-ing form).
Example:
· Incorrect: She is fond at dancing.
· Correct: She is fond of dancing.
Meanings of other options:
· In: Indicates location or time but does not fit this context.
· For: Used to indicate purpose, not preference.
· On: Used for surface-related contexts, incorrect in this case.