his, hers, it
Possessive pronouns express belongingness. Use possessive pronouns when you are talking about the same type of thing that has been mentioned but want to indicate that it belongs to someone else.
A friend of yours called yesterday.
The pen on the cupboard is mine not yours.
My mother cooks better than hers.
The solution to our problem was different from theirs.
No possessive pronoun has an apostrophe. The following are un-English:
ours’, your’s, his’ theirs’