Choose the suitable adjective clause from the options given below:

I know the girl _________ performed Bharatnatyam today.

who

The suitable adjective clause to complete the sentence is:who

The complete sentence would be: "I know the girl who performed Bharatnatyam today."

Here's why:

• "Who" is used to refer to people as subjects in a sentence. In this case, the relative clause "who performed Bharatnatyam today" acts as an adjective modifying the subject "the girl."
• "Which" is used to refer to things or animals as objects in a sentence. It wouldn't be appropriate to use it here as we're referring to a person.
• "Whom" is the object pronoun for "who" and would be used only if the girl was the object of the sentence, not the subject.
• "Whose" is the possessive pronoun for "who" and wouldn't fit in the context of the sentence.