Which sentence accurately uses the homophones “it’s” or “its”?

I think the dog left it’s bone under the chair.
Its going to be a fantastic birthday party.
As far as I know, it’s starting right after school.
The phone and it’s charger are in my bag.

Question

Which sentence accurately uses the homophones “it’s” or “its”?

I think the dog left it’s bone under the chair.
Its going to be a fantastic birthday party.
As far as I know, it’s starting right after school.
The phone and it’s charger are in my bag.

snowflake13 · Answer

"As far as I know, it's starting right after school". It's means "it is" and "its" shows possession.

shikamaru11 · Answer

The second one as "its" shows one's possession but "It's" is a homophone :) 
agree with @Snowflake13

anonymous · Answer

It's=it is/it has.
its=possessive adjective