If you are not eligible for the PG Counselling, then registering for it will be of no use. Technically, you will be able to register but if you are allocated a seat, then you will not be eligible for it and as a result it would be cancelled. So just participating for the counselling will just be a waste of money and time. So if you know you are ineligible, then don't register.

You have tagged, St. Joesph's Degree and PG college, if you wish to know about it then you can visit the link below:

https://www.careers360.com/colleges/st-josephs-degree-and-pg-college-hyderabad

I hope this answer helps. All the very best for your future endeavors!