Ethical Hacking

Ethical hacking refers to the act of locating weaknesses and vulnerabilities of computer and information systems by duplicating the intent and actions of malicious hackers. Ethical hacking is also known as penetration testing, intrusion testing, or red teaming. Hope you get this.

B.Tech has much more weightage than BCA. But B.Tech is also costly and a year-long course than BCA. Which is not suitable in your case. BCA and B.Tech both the courses will provide you with the platform to get started with programming but they might not teach you exact ethical hacking. It is something that you might have to do on your own from external institutes.

You can join BCA to learn programming languages. Not a lot of colleges teaches ethical hacking to their students. You might have to learn that from either online courses or other institutions.

There is no particular Undergraduate course in ethical hacking but there are large no of short term and long term courses.
Good Luck.

Please pursue law and do specialisation in cyber crime. This will surely help you. Prepare for CLAT exam to get a good college.

Computer Science is the best option in this line of your choice with specialized courses in internet security and more.

No, both are the different branch of B.Tech.
Good luck.

Yes, you can get a good college that's is Mandsaur Institution of Technology, which offer an average placement of INR. 12 Lacs.