hi merry,

since you belong to ST category, at 200 marks definately you will get a seat in govt. medical colleges 

in My opinion try for home state quota definately you will get a seat in mbbs in govt. medical college.

because in most of the states the marks required for getting a seat in ST category is between 250 to 180 

kindly comment your STATE OF ELIGIBILITY so that i can help you in a better way

HOPE IT HELPS

As per previous year cut off analysis it is not possible  with these marks to get a govt seat.Last year students scoring marks between 390-400 did not get any govt seat through NEET's 15% all india quota and also for state quota marks generally go around 320-400 , but you can and should always try for state quota

Also for detailed analysis report consisting which colleges you can get with given rank you can use this linkhttps://medicine.careers360.com/neet-college-predictor

If you want to know what rank you will be getting with given marks you can usehttps://medicine.careers360.com/neet-rank-predictor?icn=NEET_rp&ici=NEET_article_contmap