Dear Vidyashree, as per last year for state quota score of  375 was the highest score under SC category that fetched top most govt college -Banglore Medical College & Research Institute.

So, any score above 375+ under SC category can be considered safe.

Since your score is 450 and you have state quota then you can expect to get the top most college - Bangalore Medical College and Research Institute, Bangalore.

All the best :)

Hope this helps :)