Hi

Which category do you belong to?

What's your aggregate% in 3 year of graduation?

As per eligibility criteria your overall percentage in all the years of graduation is considered for CAT eligibility and not that of first or second or third year individually.

CAT eligibility criteria says that:
To be eligible for CAT ,
you need a  Bachelor's degree with at least 50 per cent marks or equivalent CGPA . SC/ST/PH students need only at least 45 percentage in Bachelor’s Degree in any discipline to be eligible

So, if you fulfill this percentage criteria for your category with your overall percentage in graduation then you are eligible for CAT otherwise not

For detailed information go through
https://bschool.careers360.com/exams/cat

Thank you