As u say that ur score is 450 nd u belong to SC category nd u r from Karnataka so yes u can expect a govt medical college in karnataka bt chances r not too much of getting govt medical college bt yes if u will apply for dental then definitely u will get a decent dental college in karnataka.

Good luck!

Hello aspirant, 

Well according to last year's cutoff you can easily get any government medical college in Karnataka with that score and category preference.

Here I'm providing you a link where you can look after your options 

https://medicine.careers360.com/articles/neet-cutoff-karnataka

Apply for the counseling process (applying under state quota would be beneficial for you).

Thank you