Distance/Correspondence

Engineering through distance education is not recognised. Kindly opt for some other medium such as part-time course.
Regards.

Kindly do not opt for distance engineering programs as none of them are recognised.
Regards.

Kindly visit this link:
http://www.cdeamu.ac.in/courses.php

Yes, it would be beneficial. Go ahead.
Regards.

There are many institutes but you can't pursue M.Ed without B.Ed. IGNOU is the best option if you want to pursue B.Ed.

What type of Diploma do you want to pursue?

No, you can't. Geography is practical-based and if you don't have it in your Bachelor's degree then you can't pursue Master's degree.

You could do that from IGNOU. They offer distance programs.

Here is a list of colleges:
IGNOU
Mysore University
University of Mumbai
Madhya Pradesh Bhoj Open University
Nalanda University
Kurukshetra University

No, it doesn't have too many Science courses. B.Sc MLT is a lab based 4 year course you cannot do it by distance in Delhi. You can check with Manipal University, they have this course. At this time most of the admission is finished. Jamia Humdard University is offering this course on NEET basis you can check with them. Regards.