Hello, 

As per your requirement, i would say that Getting a seat in government medical college is depending on many factors like studenrs to seat ratio, cut off, reservation etc. 

Depends on the following for state quota:
Category :Gen, OBC, SC/ST etc)
For state quota seats. Again your reservation status.In candigarh, it remains normal cut off, so follow previous year trends and try to score little more than that to be on safer side. Its better to score 400+  approx marks to get a good collegr. 

According to your preffered college, you can check its cut off in its official site and get an idea.

Good luck