Hi Sameer! On the exam day, you need to carry your admit card and photo identity card only, and nothing else. You candidate category is not relevant on the exam day, but you may require it for your IIM interview process. Right now, you just need to carry these 2 above mentioned documents. Read the following article to know what you should and shouldn't carry at the test centre.

https://bschool.careers360.com/articles/what-carry-at-cat-test-centers

All the best!