Fill in the blank with suitable adverb from the options below : Raju…

The correct answer is Option (1) → hardly

An adverb is a word that tells how, when, where or how much something happens. It can also describe an adjective or another adverb, for example she sings sweetly, very hot.

Complete sentence: Raju hardly knows anybody in the town. "Anybody" is the word used in negative sentences (not ... anybody), so "Raju hardly knows anybody in the town" means he knows almost no one there.

Option	What it tells	Example
(1) hardly (answer)	Hardly is an adverb meaning almost not. It gives the sentence a negative sense.	It was so dark that I could hardly see anything.
(2) often	Often is an adverb of frequency meaning many times. Knowing people is not a repeated action, and in a positive sentence "anybody" would mean "any person at all", which makes no sense here.	We often go for a walk after dinner.
(3) neither	Neither is used with nor to join two negatives ("neither ... nor"), or as a determiner for two things. It cannot stand alone before "knows".	Neither Ravi nor his sister came to the party.
(4) usually	in most cases, normally. Like "often", it does not fit a fact about whom Raju knows, and it clashes with "anybody".	She usually reaches school by eight.