1. Certainly it can be done legally if the said university allows it, 2. I am aware of a case whereM.SC. examination in the same subject of anthropology was appeared by a candidate twice in subsequent sessons of the same University to inprove his grade from 32nd class to 1st class, 3. The said University had such provision for sitting for examinations multiple times to upgrade their classes, 4. Enquire from your University whether they permit further sitting for examination of a subject for which you have already sat and scored pass mark with some other university, 5. It will be illegal if you suppress the fact of your passing out the same examination from other university.