CBSE 12th

Dear Sunita,
In India, I don't think that there is any specialisation for 'Astrobiology' neither job also. You can go abroad for the same.
For further queries, feel free to revert.
Good wishes.

You are advised to visit following links for information on Engineering Entrance examinations process and their calendar:
https://www.shiksha.com/b-tech/exams-pc-10
https://www.shiksha.com/engineering/resources/exam-calendar

Right now, you have only one option. You have to qualify for 12th class. It is the minimum qualification.

Hello Maddali,
Passing of 12th is the most poignant moment in one's life. You are at junction. Which road to take? I suggest, you take pause, ask yourself as to what is your passion? What are your likes and dislikes? If you start on the path of passion, you will not even feel hard work. If you work hard enough in any work, you are bound to succeed. So follow passion.

Well, you will have to give entrance tests like SAT, ACT, IELTS, TOEFL or any other exams needed to get into that college or accepted by that college and also have to have the minimum eligibility scores in 12th as required by the universities. Now, give the entrance tests and start searching for the colleges.

There are two courses that are very popular.
CA and CS. Both the courses provide a rewarding career as they provide jobs into statutory designations. Every company or business has got their accounts approved by Chartered Accountants compulsorily before final submission to the tax authorities.
Every company having a paid up share capital of 10 crores has to appoint a full-time company secretary. So both are very rewarding.
I hope this would suffice. All the best. God bless you.

Hello sajjad!
There is a quota for NRI students. Application forms for admissions under this quota can be obtained from the Administrative Officer, SSN Trust, 211/95, V.M. Street, Mylapore, Chennai 600004.
You may refer the link below for the eligibility criteria :
http://www.ssn.edu.in/?page_id=11482
The fee structure will be huge around 6-7 lakhs INR per annum or even more as it is a self financing college.

Good evening dear,
Yes, it is very much possible, the only thing that will obstruct is the lack of basic knowledge regarding chemical equations and biological terms as you will be away from the field for two long years.
Thanks and all the best.

Yes, of course, you are eligible.