India

Hi Ashadul,
The best college for MBA in West Bengal is IIM Kolkata (undoubtedly), followed by the likes of VGSOM - IIT Kharagpur, IMI Kolkata, etc. https://www.shiksha.com/mba/ranking/top-mba-colleges-west-bengal/2-0-127-0-0
Kindly visit the given link to know about more colleges.
I hope it helps.

For B.Tech, I would recommend IIT , IIIT, DTU and NSIT. These are the top government colleges in Delhi.

Hello Arman,
Yes. All NITs have what is called as home state quota. 50% seats are reserved for domiciles of the state.

You may refer to following link for information on MBA by distance learning:
https://www.shiksha.com/top-10-institutes-for-distance-correspondence-mba-article-6301-1

NITIE Powai is the best Institute for Industrial engineering. It the premier institute, which started off as an Industrial engineering institute, now offers full-time courses in industrial engineering, post-graduate programs in industrial engineering, industrial management, industrial safety and environmental management, manufacturing management, and project management. Admission is based on graduation degree.

According to my knowledge, Khalsa College, Delhi is not providing B.Tech course.