Is 9hrs in office mandatory in TCS?

Manager and TL ok with any no of hours, HR tracking and checking it before giving promotion. This is happening in our account.

It's project specific. Your HR and Senior Manager are enforcing this at their level. There are no common guidelines.

This is based on the project, some project enforce 4 to 5 hrs....

My manager is asking to come 9hrs . Is it specific to project or every1 ?

I stay 2-3 hours maximum

No

I stay for 6 hrs including an hour for lunch. Depends on your project.