Maria wasn't very glad to see her brother
I don't know the context, but I believe the answer must be predicate adjective. If your sentence goes something like "This song is popular", popular is a predicate adjective because it goes together with a linking verb ("is"), and modifies the subject ("song"), telling us what the subject is, and not what it does.
No one can answer this because we don’t have the selections. Sorry, hope you did or do good.
<span>a noun can function as an object of the preposition</span>