Science

The question papers can be purchased from any book store. You can also search on YouTube as many users upload it in their videos. You can dowdownload it from their google drive link and store in your computer

Agricultural branch is very good in IIT KGP and scope is also good, as India's more than 50 % population depend on agriculture. You can get good package also.

Yes, you can get admission. Your counseling form will be available online only when you log into your portal. After you have been allotted a seat, you will have the option to fill that form.

Yes, of course. There is obviously value of every certification any open university offers. And, there exist several universities through which you can do B.Sc in aviation.

Kindly visit this link:
https://www.shiksha.com/science/colleges/m-sc-agriculture-colleges-india

I would recommend you to check out. There might be something for the people who are or were in air force. Soif that criteria is applied on you then you will easily get admission. please check with your organisation and this is special case so even mailing them would be a good idea and they will recommend you the best that you can do.
all the best

Class 12th through NIOS is equivalent to passing class 12th through CBSE, ICSE or State Board. Depending on the subjects in class 12th, all the options will be open for you. NIOS has a diverse choice of subjects and based on your interest and what you would like to do in the future, choose them with care. The books prescribed are also made very scientifically, allowing for studying on your own. So, don't worry and choose subjects of your choice and clear them. Yes, you may get better placements.