According to the previous year cut-off for BDS in government medical College in ST category ,you must score around 220 Marks to grab a government BDS seats , admission in govt bds college seems difficult. as the Cut off changes every  year ,you can use the college predictor .the link is attached below-

https://medicine.careers360.com/neet-college-predictor?utm_source=qna&utm_medium=neet_cp

Hello student

hope you are doing well and safe. With reference to your query,  I would glad inform you that at your rank you holds very good chances of getting ST in bds course in Haldia Institute of Dental Sciences and Research, Purba Medinipur . I would advise you to go for this college because it is very good in terms of infrastructure and faculities . Following is the link of cut off for reference:-

https://medicine.careers360.com/articles/neet-cutoff-west-bengal

Hope you found this answer informative. Best wishes for your future