There are very good chances of you getting your desired stream in the same college.

Yes, you can surely get admission in this. 

Hi Chandan!! 

Yes definitely, you can get NIT trichy with 150 marks in ST category and your rank would be between 100-120. You can get branch upto computer Science in that college. 

Please upvote if this was helpful to you. 

Thank you and good luck. 

Hello, 
Your marks are good enough to get you a seat in a good NIT. With reservation you may have ample amount of chances to secure a seat in NIT Trichy. Please mention your category rank to get more accurate answer.