Hello Soumya,
You can’t do B.Tech in top college like IITs/NITs/IIITs since one need to score 75% marks in PCM and BITS, of course, one needs to have more than 75% aggregate and 60% in each PCM. So you are not fit for B.Tech/B.E. According to my knowledge, there aren't any colleges which provide B.Tech for non-science background without maths at least. Another way to join B. Tech would be through a diploma in computer science and join BTech as lateral entry.
So you can try for BCA if there are not any criteria that one need to have a Science background because some colleges have it. And then you can go for MCA at top colleges in India and of course, the placement is superb there.
Also if you are kind of creative you can also go for Animation. Many universities/colleges in India provide B.Sc or might be BA at (Animation and Gaming). It too has a bright future ahead. You can look up top colleges online and see their admission criteria.
Good luck!
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile