GMAT Sentence Correction (SC) | Relative pronoun modifier

Hello All

This is my first post in the verbal forum as I am really struggling. I was wondering the use of the relative pronoun modifier. E.g.: which, that, who, etc.

For example, please could you tell me whether the following iscorrect ?

1.) I like the girl in the room, who is young and beautiful.
- “who” is specific enough to modify “the girl”, but the relative pronoun “who” is not immediately
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