Science

Hi Priyadarshan,
You can go for B.Sc (Hons) Mathematics. Eligibility- 45% aggregate of four subjects PCME with 50% in Mathematics. No entrance exam is there. Admission is strictly on merit basis. However, most colleges have a different provision for admission. You need to contact the institute officials personally for specific admission details as it differs from one college to another.
Colleges that you can consider-
Andhra University
Allahabad University
Banaras Hindu University
University of Rajasthan
University of Pune
University of Mumbai
University of Mysore
You can refine the search as per your preference and shortlist the ones for which you meet the qualifying criteria.
As for choosing the best, you can consider parameters such as Faculty, Course Material, Quality Education, Fees, Accreditation, Infrastructure and Success Rate.
Hope this information helps. Please feel free to revert.
Wish you luck.

If you want to do job after B.sch than there is nothing bad in it .You can go for web designer job but there are also many other career scope available after B.sc.
You can also go for software jobs .there are a lot of well known software companies are there in india i.e. TCS ,Infosys .So you can try for that ,It gives you opportunity to go for abroad.
Rather than i can suggest you to go for higher studies.you can do M.sc but i suggest you to do M.sc from IIT & IISC .It will open the door for future easily.
for getting admission in IIT Start preparing for IIT JAM Exam ,This Exam is conducted in January so you have enough time to prepare for it.
For more information check this:
https://www.eduncle.com/iit-jam-exam

Hi Priyamvada,
As per the official site of UPSC,
" To be eligible for Indian Economic Service (IES), you need to pass post graduate degree from a recognized university in Economics/ Applied Economics/ Business Economics/ Econometrics.
To be eligible for Indian Statistical Service, you need to complete post graduate degree from an Indian university in Statistics/ Applied Statistics/ Mathematical Statistics.
Candidates appearing in qualifying degree exams are also eligible provisionally subject to producing proof of passing along with Detailed Application Form. "
You may refer to the official site : http://upsc.gov.in/general/ies-iss.htm
Hope it helps. Please feel free to revert.
Wish You Luck.

It totally depends on your area of interest and the stream in which you are comfortable .there are many career options available for you based on 12th.Here are some of the courses,you may select any based upon your interest:
1. Mechanical Engineering
2.CSE Engineering
3.Civil Engineering
4.Electrical Engineering
5.B.SC
6.Biotechnology
but it is suggested to choose the college carefully as it matters a lot for your placements and package.Here are some of the colleges where you may apply:
1.IITS
2.NITS
3.Lovely Professional University
4.BITS
These along with good education provides an excellent platform to bring your innovative ideas into practice with good placements.