I got 71 percentile in cat and i come under sc catergory! Am i eligible? What is the admission process?

XLRI unfortunately only considers XAT and GMAT scores for admissions.

You are eligible as everyone who writes CAT and opts to be considered for admission at the time of filling up the CAT form is eligible for the admission process. You need GD/PI calls from various IIMs and then you can appear for those. The admissions process then continues where each IIM declares th