CBSE 12th

If you are not interested in engineering then you may go for graduation field like B.Sc Agriculture, B.Sc maths, B.Sc bio, etc.
These fields too have great career options.

Dear,
If you are really interested in B.Tech/B.E in undergraduate level - you are to be routed as -
1. Appear in joint entrance exam for Diploma Engineering with your 10th. result.
2. Do diploma Engineering (3 years duration)in your preferred branch.
3. With Diploma Engineering certificate take lateral entry in 2nd year of B.Tech/B.E in the same branch through entrance exam.
4. Now, complete it in 3 years duration.
Best wishes.

Hi Priya,
You have a decent career record only your graduation marks are bit low.
Still you can go through the link below to see which top colleges will accept your score:
https://www.shiksha.com/mba/colleges/mba-colleges-accepting-cmat-india
I hope this helps.

It is not possible to get admission in IITs and NITs But you have only one chance I.e work very hard for 1 year.

You can go for engineering if you have interest in Science, if you are interested in social sciences, B.A is good option. If you are interested in Business than BBA, finance/accounting than B.Com.

You can go for Electronics and Communication Engineering (ECE) stream in engineering after 12th. Mobile Communication and Semiconductor technology used in Smartphone are part of Electronics course. You can very well go for job in companies like Samsung, Airtel, BSNL after B.Tech in ECE.

You must sit for IIT-JEE Main/Advanced and clear both the exams and try to get in Indian Institute For Space Science and Technology-Trivandrum. Its one of the known institute for Aerospace and Avionics related courses.

You should prepare for NDA exam after completing class 12th. For NDA exam, the basic requirements are as follows:
1. You should complete class 12th exam.
2. You can prepare for current affairs, reasoning, mathematics and English. You can go through previous question papers from competition success review magazine.
3. You can appear for NDA exam.
4. You can prepare for SSB interview.

Hi,
You can pursue B.Sc honors in biology + M.Sc + NET to apply for professorship. Ph.D in the subject will help you in further.