Computers & IT (Non-Engg)

Christ University is the best BCA college of Karnataka. You may refer to list of top BCA colleges at following link: https://www.shiksha.com/it-software/ranking/top-bca-colleges-in-karnataka/96-2-106-0-0

Hey,
If you are interested in business in IT field then B.Tech is better for you from a good institute and after that, you can do MBA.

Average salary of MCA grads is marginally lesser in comparison to B.Tech CSE who are paid the best because of their superior computing skills. Salary offered to Generic MCA grads is similar to MCA with specialisation as Clould Computing, etc.

B.Tech CSE is the most preferred degree of all IT companies. You can complete B.Tech CSE in 4 years after 10+2 stage, but you will take six years to complete MCA (10+2+3+3). B.Tech CSE grads can do both Systems and Apps Development but MCA grads are trained to do only Apps Development. Therefore, you may prefer B.Tech CSE over MCA.

You can go for ethical hacking, web designing, animation designing, hardware research, software engineer, game maker and many more option are available, you can check it.

Both are equally good. The MBA people are more known for their business tactics and they help in uplifting the business organization of the company. MCA people grab the technology part to cope up with the company's business needs. They both accentuate a company's profits.
Regarding salary, MBA people get more than MCA since they help in reviving the business policies of the company which straightaway leads in to profit(If modeled correctly). You didn't mention your graduation stream so it is difficult to know your inclination.