India

Admission in all the best Engineering Colleges ( IIT Delhi, DTU, NSIT, IIIT, etc ) is by JEE Mains and JEE Advanced results. You have options to appear in GGSIPU CET for Engineering to take admission in GGSIPU affiliated engineering colleges.

Following are some of the affordable MBA colleges with reasonable fee in Delhi:
(a) FMS, DU
(b) Department of Commerce, DU
(c) Department of Financial Studies, South Campus, DU.

Here,
I suggest some good college for petrochemical engineering college in Gujarat:
School of Petroleum Technology
Pandit Din Dyal Petroleum University,
Government Engineering College.

There are no more distance learning centers in North India. Here, I suggest better distances learning centers in India. you can choose any one of them:
Annamalai University
Amity University
IGNOU
Karnataka open University
Thapar Institute of Engineering and Technology
Mahatama Gandhi University

Their are many colleges in Delhi to pursuing B.Tech, but before admission in this college, you'd have to qualify the JEE cut-off for these colleges according to your branch preferences.