B.Sc

Make sure you score well in CBSE boards and the rest depends on the cut-off of the respective course.

If you are not eligible for NEET exam then it is not good to again go for class 12th exam as you are wasting your year. So, go for any other course of your interest.

Hello Sai,
Please visit the link provided for detailed information about college offering this course:
https://www.shiksha.com/aviation/colleges/colleges-india.

You can directly get admission in B.Sc and you have to fill the admission form.

There are great research facilities here available in Shiv Nadar University, as ours is a research oriented university. If we talk about placements, B.Sc physics student don't generally go for placements in our university, they go for higher studies. There are placement opportunities if you want to sit for placements but there are not many opportunities.

Yes, you can.
https://www.shiksha.com/mba/course/post-graduate-diploma-in-instructional-design-pgdid-symbiosis-centre-for-distance-learning-Agra-205424

B.Sc. (Hons) is much more specialised as compared to the B.Sc (General) degree, and academically, B.Sc (Hons) is a more standard degree as compared to B.Sc (general). If you want to study any one of the main sciences (e.g. chemistry, physics, mathematics, etc.). In detail, it is advisable to go for a B.Sc. (Hons) course. But if you want a more balanced and multi-disciplinary approach, it is better to pursue a B.Sc (General) course for under-graduate studies.
If you want to join the defence ministry, I would recommend you appear for the CDS or SSC exam, or join politics to get assigned high profile portfolios in the defence ministry.

Please refer to the link provided below for a list of colleges which offer B.Sc. In IT courses from Kolkata. There are over 20 colleges which offer this course in Kolkata. You can use the link to navigate to a college of your choice using the filters on the web page. Regards.
https://www.shiksha.com/it-software/colleges/b-sc-colleges-Kolkata.