Identify the sentence which has the correct superlative degree.

An adjective is a word that describes a noun or a pronoun.
The superlative degree is used to describe an object out of a group.
Example: Gold is the most precious metal.
The noun after 'one of' should always be plural in form.
Example: He is one of the best writers that have ever lived.
According to the rules and examples above, the sentence given in option 1) has the correct superlative degree.

Correct sentence: Lamisa is one of the most brilliant students in the class.