Hello,

As per your requirement, i would say that as you have got 300 marks in obc category, and you belong from tamil nadu so it would be quite difficulty for you to get a government seat in TN  but you may get it even as you have sc caste reservation for you to avail but generally its safe to score above 400 marks because TN state basically has a high cut off as lot of students belong from that state.

Getting a seat in government medical college is depending on many factors like studenrs to seat ratio, cut off, reservation etc.

The cut off as per your caste would also depend on which state domicile you have as few states havr higher cut off .So it varies from state to state.

You can apply for both state as well as aiq quota seats. But it would be diffcult as your markd are less as compared to the cut off.

Good luck