Greetings Afsar!

Hope you're doing great.

If you're talking about B.tech course from Don Bosco then the eligibility criteria are as follows: The minimum eligibility is to pass 10+2 examination with at least 45% aggregate marks and Physics, Mathematics, and Chemistry as compulsory subjects. As you can see, you're pretty much safe when it comes to HSC scores and rest depend upon the score in the competitive examination.

The cutoff for Don Bosco varies every year. The last year cutoff of the student who got admission in the college was around 127 marks for general category. You can visit the college website for the same. 

Hope you'll find the answer useful. Do reach out, in case you need any help. :)

Cheers!