Certificate

Yes, you can take admission for B.Tech, because you can give an exam of NIOS. It is equivalent to any board.

If you are talking about caste certificate or EWS certificate or about scholarships, then you must have income certificate.

Hello,
You have to submit only Photostat for BA B.Ed.

Yes, Basic Teacher Certificate is valid for the post of primary teacher in CBSE also.

Yes, you can use the birth certificate as nationality certificate for uploading it on Saar portal. Birth certificate consisting the place of birth, which is state and then the country (which basically states the nationality). So, you can make sure to add it on the portal and go for the further process.

Yes, for every medical problems faced, medical certificate is a must in every field of study and work.

You will get ews reservations under it which is nearly 10 %. So, your chances of getting a better seat will increase if you come under it.

Yes, you had to submit all original documents including Migration certificate during admission process. For more information regarding admission process, visit the Delhi university website.