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Hello,
It depends on what were your courses in class 11th and 12th. A career in the similar stream which you had in your class 11th and 12th will help you succeed better. Commerce and science are the two broad categories. In commerce, you can go for arts/design, business, finance and banking.
In science, you have engineering and medical. These are the traditional streams students choose. Some new streams are also in demand nowadays like biotechnology, nanotechnology, agriculture and genetics. Students are also moving towards fashion designing and interior designing. We have B.Arch. exam for such students. Research-oriented students can go for KVPY and get admission institutes like IISC, IISERs. Commerce students can also go for CA.
So, there are courses like typical mechanical/electrical and computer science in engineering to newer ones like hotel management and fashion designing. You can opt for any of these as per your interest.
I hope that I have been able to answer your queries to your satisfaction. If so, kindly upvote this answer. If you have any further questions, kindly revert.