Hello Aspirant,

Yes, you can sit for the CAT exam with a CGPA of 8.5. However when you do crack the CAT exam and have to sit for the interview round or the Group discussion round, you will be asked the question about 4 years of graduation, in which case, carry your hospital records and medical certificates to prove to them that you actually had some health issues during your graduation. This shouldn't be a problem because you had a genuine reason for the one-year gap.