Hi

No, you are not allowed to do so.

Change in entire course is not in hands of university. It's functioning of exam conducting institution.

You can not go from BDS to MBBS in a specific year of choice through NEET.

If you give NEET, you will get college according to your performance and then it's a fresh start of first year. You can't jump to second year directly.

If you want to change course, go for NEET again then start with fresher year of MBBS.

Best of luck

Best of luck.