According to the eligibility criteria, you must have completed a Bachelor's Degree with at least 50% marks at the graduation level (SC/ST: Passing marks; OBC/PWD/CW: 45% weightage as per university rules) or equivalent CGPA.
It doesn’t mention anything about the 10th and 12th marks for being eligible for admission, but there is a weightage of
So, you will need to perform really well in the SOP, Extempore, and PI along with the CAT exam to stand a chance for admission.