hey vidyashree 

under state quota you might get following government medical colleges in karnataka with 420 marks belonging to SC category 

• bangalore medical college and research institute, bangalore
• mysore medical college, mysore 
• mandya institute of medical sciences 
• hassan institute of medical sciences 
• karnataka medical institute of medical sciences

there are various other colleges also. visit following link to know more colleges in karnataka with their previous cut off https://medicine.careers360.com/articles/neet-cutoff-karnataka 

goodluck