Yes, you can file RTI if it is a government departmental exam.
You have to provide a copy of your admit.
You can request information under section 2(f), (i), (j) and 6(1) of the RTI Act 2005.
For further assistance to file RTI application to any PIO please refer Online RTI-File RTI Online to Any Govt. Office in 3 Steps(All 29 States) https://onlinerti.com/