I got a bit confused regarding possessive pronouns and found some info regarding the same.
I just thought to share it and would love to have more inputs on this topic.

The lamp decorated the child’s room filled his room with innocent beauty. = Incorrect
Correct = The lamp that decorated the child’s room filled his room with innocent beauty.

In spite of Charlie's protest, his friends-including his closest companion Rafael- insisted that Charlie consider outside aid to help Charlie deal with his eating disorder.

The explanation said that "The use 'his' in the phrase 'his friends'/'his room' is okay, because only possessive pronouns can refer to nouns that are part of a possessive clause".

Mgmat Reply

here are a couple of examples we've used in our curriculum:

"Jose's room is so clean that his mother praises him."
"his" can refer to "Jose's" because they are both possessive; however, "him" is a problem because an object pronoun cannot refer to a possessive.

"Jose keeps his room so clean that his mother praises him."
no problems here; both possessive and object pronouns ("his" and "him") can refer to a subject noun.


TAKEAWAYS
1. A possessive pronoun can refer to the antecedent in possessive form.
2. An object pronoun cannot refer to a possessive noun antecedent.