WHOM TO SEEK INFORMATION UNDER RIGHT TO INFORMATION ACT,2005

You have to just write "Public Information Officer" and the address of the Office. It is mendatory for them to appoint PIO and display and if not, the senior most/in charge will authomatically becomes PIO.

Agree with SHRI  Boda ji

As Per RTI ACT, 2005 in every office has option for PIO / APIO.

YOU CAN ALSO PROCEED YOUR RTI APPLICATION ASSISTANT PUBLIC INFORMATION OFFICER , AS PERRTI ACT, 5 DAYS WILL TAKEN EXTRA BY THE DEPARTMENT.

 REGARDS