Fill in the blanks with the most appropriate option:-

I met ………. Gopal nor his sister.

neither

The most appropriate option to fill in the blanks is neither.

The sentence is about the speaker's failure to meet Gopal or his sister. The word "neither" is used to negate two or more items in a list. It is the most appropriate word to use in this context, as it describes the fact that the speaker did not meet Gopal and his sister.

The other options are not as appropriate:

• Either is used to indicate that two or more items in a list are possible. It is not as appropriate as "neither", as it does not convey the same sense of negation.
• Or is used to indicate a choice between two or more items. It is not as appropriate as "neither", as it does not convey the same sense of negation.
• Not is a negative word, but it is not used to negate two or more items in a list. It is not as appropriate as "neither", as it does not convey the same sense of completeness.