CBSE 12th

Hi Kuldeep,
Choose the subject or programme basis your interests, aptitude and career plans. It is advisable that you involve in more research on career outcomes of various subjects in your branch, see what interests you and meets your career goals. You should know the kind of job you want to do, when you say 'career prospects' be sure what kind of career you are looking for.

Hi Asim,
A biology background student can opt for any of the following below, these are the most popular options.
1. MBBS
2. Biochemistry
3. B.Sc Biology
4. B.Sc Botany
5. B.Sc Zoology
6. Bachelor of Agriculture
7. Bachelor in Diary Farming
8. Health and Fitness
9. Food and Nutrition and many more.
Which course you should pursue is something you must decide as per your own interests. Know what you want and study what you will most likely enjoy.

With a minimum of 82% general category, you can get admission in DU.

Dear Rajendra,
You can do Bachelors in prosthetics & orthotics course from Chennai.

No. PU doesn't offer automobile and for other branches, it offers only on JEE Mains rank.

You may apply for a Diploma offered by many institutes like Frankfinn, IATA, etc. through their websites or in person. Choose from here:
https://hospitality.shiksha.com/diploma-in-cabin-crew-training-in-india-categorypage-6-87-271-0-0-1-1-2-none-1-0

Any graduate who has passed or appearing for the final year 3 years graduation degree examination in any discipline (Science, Commerce, Arts, Engineering or any approved University) is eligible to apply for admission in MCA postgraduate degree course. Candidates must have mathematics as a subject in their 10+2 course or any one year of graduation degree.
You are not eligible for seeking admission in MCA no. You are advised to choose any graduation degree of your choose and appear for MCA entrance examination in final year of graduation degree.

You may refer to the answer below for better clarity-
https://ask.shiksha.com/how-to-apply-for-pilot-after-class-12th-qna-3590531

After 12th Arts, there are many options to be pursued like B.A., L.L.B., B.B.A.,B.com,C.A. graduate and others. But choice depends on you to select from many of these.