BCA

That is totally up to your interest. What you feel like reading doing experimenting experiencing. If you're interested in computers then go for BCA and if you're interested in doing Science. Go for B.Sc. Simple as that. Both B.Sc and BCA have there own benefits and losses and everything goes like this only. A BCA degree can take you places. With a Bachelors degree in computer applications, you can find a reasonably good start in the Information Technology industry. BCA holders get a job in IT segments like software Services, Business Process Management (BPM/BPO), engineering services and computer hardware. Entry level BCA job salary can be between 18,000-25,000 INR per month after you complete a short training.

Firstly ascertain your priorities, Do you want to do BCA for Knowledge or just for Money or just to save Money for your future degree. Let me answer considering Knowledge as an aspect: B.Tech being a 4 year course has better chances of imparting you indepth knowledge of Computer Science (am assuming you will go for CS/IT if you do B.Tech). But then a lot depends on the college you join. As I already said better chances but no guarantee. 3 cousins of mine used my Final year project to pass their B.Tech (I think I forgot to tell I am a BCA). So the assumption that B.Tech will give you better understanding of subject is a notorious one. Moving on to Money you would make or Money you would spend: I spent almost 1.1 Lacs (including the cost of computer I bought, I assume you already have one) in completing my BCA from a non funded seat of government college, which is a big saving compared to expenses you will meet while doing B.Tech from private engineering college. Now how much would you make, So let me tell you my story, I joined Infosys after completing my BCA at a package of 2.25 Lacs in January 2011 (hired as on Operations Executive), was elevated to 3.50 Lacs (promoted to System engineer) in month of October 2013 and I am currently earning 4.20 Lacs (Senior System engineer). B.Tech fresher were being hired at some where between 3.20 - 3.50 in 2011 (I don't know current package being offered to them) and in the same time if they haven't left the organisation yet are earning somewhere around 4.50 - 5 Lacs. So basically it took me almost 2 Years to match the package at what B.Tech were hired, and this difference will always remain until and unless of course I leave the organisation and join somewhere else at better package, but that applies to B.Tech as well which is entirely a different story. I would also like to tell you not only are we paid lesser in Infosys but are also treated as lesser employees. In projects where client do not have specific requirements for 12+4 year educated employees, BCA are put in such projects to do menial jobs which B.Tech smart asses won't do, like updating excels or doing monitoring or regulating mails or more menial things like taking calls. Almost all BCA pupil end up spending at least 2 and at max inly God knows how many years for studying only 1 year less than B.Tech.