Choose the suitable adjective clause from the options given below: I…

The correct answer is Option (2) → who

An adjective is a word that describes a noun or a pronoun, for example a tall tree, the food is tasty.

Complete sentence: I know the girl who performed Bharatnatyam today. The noun is "the girl", a person, and in the clause she is the one who performed, the subject of "performed". So the clause is "who performed Bharatnatyam today".

Option	What it tells	Example
(1) which	"Which" is used for things and animals, not for a person.	–
(2) who (answer)	An adjective clause describes a noun and begins with a relative pronoun. The choice of pronoun depends on the noun and its role in the clause: who — a person, as the subject of the clause. whom — a person, as the object. whose — possession. which — things and animals.	The man who fixed our car lives next door.
(3) whom	"Whom" is the object form. Here the pronoun is the subject of "performed".	–
(4) whose	"Whose" shows possession and must be followed by a noun (whose dance, whose sister).	–

Contrast: who is the subject form (who performed). Whom is the object form and cannot be the subject of "performed".