CBSE 12th

Hello Yash,
I understand and appreciate your interest in pursuing Computer Science Engineering. To be able to pursue engineering, you need to have Physics, Chemistry and Mathematics in your 12th standard examination and you need to score a minimum of 50 percent throughout, as well as 50 percent in Physics, Chemistry and Mathematics to be eligible for engineering in most colleges (IITs demand 75 percent while other government colleges including NITs demand 60 percent). If you satisfy these eligibility criteria, you can opt for Computer Science Engineering.
I hope this answers your question to your satisfaction. If so, kindly upvote this answer. If you have any further questions, kindly revert.

Hello Shashi,
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 bio- tech, nanotechnology, agriculture and genetic. Students are also moving towards fashion designing and interior designing. Research-oriented students can go for KVPY and get into institutes like IISC, IISER, etc. Commerce students can also go for CA. There are courses like 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 it helps. If so, kindly upvote this answer. If you have any further questions, kindly revert.