Hi i got 153 and i belong to ST do i have any chance in getting a seat in govt medical college of Assam

You havent mentioned whether you belong to Plain area or Hill area. Neverthless, in 2018, under State Quota, the cut offs for ST under these 2 sub categories have been as follows:

ST Plain:  264
ST Hill:  211

With 153 marks, unfortunately you fall short by a huge margin. Having said that, cut offs change every year and are dependant on various factors like no.of seats availble, no.of candidates appearing for the exam, top NEET score and difficulty of the exam. You can check the cut offs of your Category at:

https://medicine.careers360.com/articles/neet-cutoff-assam

You can also use our College Predictor services to check your options:
https://medicine.careers360.com/neet-college-predictor?utm_source=google-search&utm_medium=paid&utm_campaign=neet-clgpd