Which of the following word is a noun?

সঠিক উত্তর হচ্ছে অপশন 'D' অর্থাৎ Levity.

"Levity" (ঘ) is a noun because it refers to lightness or humor in speech, behavior, or attitude.

"Levelly" - This is an adverb, indicating how something is done, such as "speaking levelly" or "approaching a situation levelly.

""Lewd" - This is an adjective, describing behavior that is crude, vulgar, or sexually inappropriate.

"Lexical" - This is an adjective, relating to words or the vocabulary of a language.