Hello Sir!

The cutoff marks in NEET for ST candidates is 146-113. Your son's marks is above the cutoff, so he is eligible for MBBS. However, with this marks, it is very difficult to get a MBBS seat in govt or private college.

Secondly, Government or private colleges do not offer free MBBS seat. The college fee will be low for reserved categories, however, there is no previlige of free seat.

You can use the college predictor tool below to predict any chance of getting a MBBS seat :

And here is the article that has a detailed information about MBBS colleges in India:

https://medicine.careers360.com/colleges/list-of-medical-colleges-in-india

Hope this would help!