Distance/Correspondence

Even if there is one, don't join. There are no correspondence course for M.Tech.

Hi,
Total fee structure of IIBM Institute of Business Management - correspondence MBA is INR 35,000 (fees components : tuition). It is an one time payment.
https://www.shiksha.com/mba/course/master-program-in-business-administration-iibm-institute-of-business-management-nehru-place-delhi-268120

Hi,
You can opt for IB in class 11th as per your interest. But, it isn't compulsory.
In my opinion, pursuing BBA through distance mode isn't a wise choice. There are good colleges in the country that offer BBA through regular mode with lucrative packages and you should aim for that after your class 12th.
Some of the colleges are: -
Symbiosis International University
Delhi University
Christ University
Mumbai University
SPJMIR Mumbai
IIM Indore - Integrated BBA and MBA
You can start preparing for the entrance exams.

SLET is the acronym for State Lecturer Eligibility Test and is conducted on state level and qualifying this test from a particular state makes a candidate eligible to get appointed as lecturer in universities and colleges situated in the same particular state.
To be eligible for SLET, candidate must have qualified Masters degree program with a minimum of 55% marks, which is relaxed upto 5% for candidates belonging to Sc/St category.
As far as the syllabus is concerned, it is similar to the National Eligibility Test in lectureship.

If you too are planning to apply for a B.Sc or M.Sc course but are puzzled about choosing the right college, you are certainly at the right place. Given below is the list of top 10 B.Sc/ M.Sc colleges in India in 2016 basis ranking released by India Today. Towards the end, we have also listed the top 50 B.Sc/ M.Sc colleges in India in 2016 as mentioned in India Today rankings.
https://www.shiksha.com/science/articles/top-10-bsc-msc-colleges-in-india-blogId-13473