The chances of getting a government medical college for either MBBS or BDS is next to nil with your score.

A score above 550 should secure a seat in some government medical college via 85% state quota while for BDS, you need to score above 510 to increase your odds of selection into a government medical college. 

Hello,
Based upon your score in NEET 2018, and the previous year cutoff, chances are less for admission to Government Medical Colleges under All India Quota and state quota. You may have chances in Private Colleges at state level quota. Use NEET College Predictor to Check Your MBBS/BDS Chances in Deemed Universities & State Quota seat Based on Your NEET AIR
   https://medicine.careers360.com/neet-ug-college-predictor?icn=neet-clgpd&ici=qna-answer  

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