Mike gave Sarah the keys to his house. The website that I study claims that it is a personal pronoun. But since it is his house, should't it be possessive pronoun?
It will help knowing what language you're coming from.
Anyway, in the example his house, the word his is possessive. It is because it indicates ownership (possessive case).
The question should have been worded like this:
Is the pronoun “his” a personal or possessive pronoun in following sentence?
Since you're learning English, I thought you'd like to know...