Information Technology

In UGC NET paper 2, you have to appear for the same stream in which you have done your PG.

Go through the link below for best BCA colleges:
https://www.shiksha.com/it-software/ranking/top-bca-colleges-in-Delhi/ncr/96-2-0-10223-0.

JNU MCA result will be declared by the end of March, the exact date is still not out.

Yes, you can apply for it.

Yes, you can join MCA after doing B.Sc. Condition is that you should have mathematics as the main subject
Also, to take admission in a good college, you should secure 60%.

Among BCA, B.Sc and B.Tech, you can select any course, selection of best course among above depends upon the college in which you are going to pursue that course, because college matters more than course. Example, if you have completed your B.Tech from a normal college and the same course from any IIT College, both are too different.