You got KCET marks 100 and PCB board marks 268 out of 300, and belong to OBC 2A category, so you want to know if you can get admission in government veterinary college or private veterinary college.

1, Veterinary seat in government college usually need marks around 110 to 130 out of 180 in PCB KCET plus state quota, so 100 marks is a bit below typical cutoff for govt seat

2, OBC 2A reservation gives benefit but still cutoff may be around 100 to 120 marks, you are on edge so chance is possible but not certain

3, Private veterinary colleges have lower cutoff and accept marks around 80 to 100, so you have good chance there

4, After cutoff you must attend KEA counselling fill veterinary course and preference list

5, If not get govt college in first round you may get in later rounds or spot counselling under reserved category

6, You should also check veterinary college seat matrix and last year closing marks to confirm your chance

More detailed info on veterinary admission and cutoff you can see here

https://engineering.careers360.com/articles/veterinary-admission-process

https://www.careers360.com/colleges/list-of-veterinary-colleges-in-karnataka