Hii Aspirant,

Every year the admission in government college differ according to the cutoff and the difficulty level of the exam and on various different factors also.

Since you are belonging to St Category there is still chances for you to get admission in government college.

According to the previous year's cutoff and the cutoff released for NEET UG 2020 by NTA for ST Category is mentioned below.

Year   Category   cutoff percentile   expected score

2019 ST 40 percentile 133-107

2020 ST 40 percentile   146-113

From this cutoff you can predict about your chances for the mbbs

You can check all India cutoff from the below mentioned link
https://medicine.careers360.com/articles/neet-cut-off

You can also check the below mentioned link for the prediction of college according to the Mark's you have secured

https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer

Hope this will help you..

All the best !!