Science

The fee structure of B.Sc Electronics is Rs. 39,000 and including the hostel charges, it will be a thousand rupees more.

You can pursue your B.Sc in FN at Madurai Kamaraj. It is a recognised institute. https://www.shiksha.com/science/course/b-sc-nutrition-and-dietetics-directorate-of-distance-education-madurai-kamaraj-university-287463.
https://mkudde.org/ug_courses.php

Since the admissions are over this year, you can only apply next year now. You will need to apply online on the official website of Christ at https://appstat.christuniversity.in
Then, you will give exam and based on your result, you will be allotted a college.

You can pursue 2 regular courses together. That will be illegal and may cause you some serious problems in future. What you can do is that pursue a course through correspondence or distance from recognized institutes like IGNOU etc. And pursue another one through regular mode.

M.Sc Statistics and computational is better than the other one, as it has a wider scope for job market.

You may want to consider Bachelors in Science. Variety of options are possible. Example - Physics, chemistry, biology, mathematics, genetics, biotechnology, bioinformatics, biochemistry, physiotherapy, and nursing are various specializations you can consider based on skill sets and interests.

Eligibility Criteria for DNS -
10+2 with Physics, Chemistry and Mathematics (PCM) with not less than 60% aggregate marks from a recognized board.

It is 10+2, after registering and applying online eligible candidate need to appear for aptitude test conducted by the college. Then, based on marks of aptitude test, they will be called for personal interview. This the admission procedure.