CBSE 12th

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.

The career path to become a Charted Account (CA) is challenging, but is very promising. You will have to devote 5 years to your education in order to become a CA.
Chartered Accountancy is one of the highest paying careers in India and is a good career option, if you are interested in subjects like taxation and accounting. The career path to become a Chartered Account (CA) is challenging but is very promising. You will have to devote 5 years to your education in order to become a CA.
There is a good demand of CAs in India within private as well as public organizations. A chartered accountant is hired to deal with the account details of an organization. They also help in solving disputes and preventing bankruptcy. If you are planning to pursue this career then it is a better idea to start after class 10. Find out the career details of a CA below:
Exam and Courses required to become a CA:
CPT (Common Proficiency Test)
IPCC (Integrated Professional Competence Course)
FC (Final course)
Eligibility:
Candidates are eligible to register for CPT after class 10 but they will be able to appear for it only after passing class 12.
Students of commerce, Science as well as arts stream can apply for CPT.
Students of Commerce Stream need to secure 50% aggregate marks in Class 12 exams in order to be eligible for CPT.
Students of all other streams need to score an aggregate of 55% excluding Mathematics and 60% including Mathematics in Class 12 board exams.
On clearing the CPT exam successfully, candidates become the member of Indian Chartered Accountants Institute (ICAI) the exam and course conducting body for all CAs in India.

There are many courses that you can opt for after class 12th. B.Tech and MBBS are all-time favourites but then life doesn't stop here only. You have various other good options available.
If you are interested in pursuing a course in the science field, you can go for various B.Sc courses like Physics, Chemistry, Botany, Zoology, Maths, etc. Other than these you have specialized ones like Biotechnology, Biochemistry, Microbiology, Forensic, Agriculture, Food Technology, Computer Science, etc. Apart from these, you have honours courses too. You can also go for paramedical courses like Pharmacy, Physiotherapy, Ayurveda, etc.
Other than science stream, you can have a career in Journalism, Film and TV production, Management, Hotel Management, Fine Arts, Performing Arts, Physical Education, Yoga, etc.
There are many reputed universities like Lovely Professional University, Chitkara University, Chandigarh University, Rayat Bhara University, etc., which are offering a wide variety of courses to choose from.
Check some of these universities for more details.
Good luck.