CBSE 12th

Following are career options in field of IT:
(a) Development and Testing: In order to have technical career in IT, you require educational qualifications such as BTech CS/ IT, BCA-MCA, BSc-MSc CS/IT.
(b) IT infrastructure support including Desktop, server, networking, Telecom support. Most of these roles are filled by Electronics and Science grads or diploma and degree holders.
(c) Project Management: Technical Professional grow into role of Project Management with Certification such as PMP, PRINCE2 etc after few years of development or testing experience. Some MBA IT grads get Project Management opportunities directly.
(d) Business Analysis: Subject Matter experts with domain experience in Functional areas such as BFSI, Healthcare, Travel & Transportation etc can become BA. Most of the BA are with MBA background with BA Certification such as IIBA or BCS.
(e) Business Development: MBA grads have opportunities in IT industry in PreSales support, Sales & Marketing and Account Management.
(f) IT support role in Quality, Technical writing, Customer service engineer etc. These roles are filled with lower education. profile professional such as BCA grads.
(g) In addition IT industry requires HR, Finance and Accounting, Administration professionals.
BTech CSE is the best option among all the above mentioned options. You can chose any based on your interests.

I completely agree with Megha Bhardwaj's reply. I would like to add that the term interest or passion at the age of 17 or 18 could even be a sort of infatuation. So while taking a career decision, do not check the interest level only as at this age, many students may have multiple interests and they may not be able to make the right choice. So, consulting a career guide would be a good option as the opportunities which are presently available and would be available after many years require careful consideration. There are lakhs of Indian students who have told me that their keen interest is to become a film maker. But instead of going to a film school they will be enquiring for courses in an animation college or arts and science college who will definitely not be able to make anyone a film maker. So, unless a student understands the risks involved in becoming a commercially established film maker, if he simply ventures into a course, then there are 100% chances that he may not even get a simple job after course completion and it would become pointless to blame anyone at that time. So, interest must be evaluated against opportunities. And interest should also be evaluated against the basic abilities / natural talents of a person. This would be a better method to derive at the career choice.