B.Ed

You can opt for Business Studies, Economics, English.

You won't be able to as your major subjects are different in graduation. However, you can give your preferences added to your electives.

For seeking admission to Annamalai University DDE go to the website - 'audde.in'. On this website go to the online payment link and then fill the application form by giving your details and submitting fees. They will send the required material by post.

Hi,
Please find the link below:
https://www.shiksha.com/teaching-education/course/bachelor-of-education-dolphin-pg-institute-of-biomedical-and-natural-sciences-dehradun-206519

Hi, The minimum duration for B.Ed through distance education is two years, however, the maximum duration is five years. Admission to the distance mode programme is merit-based. Candidates should have scored a minimum of 50% aggregate marks in the undergraduate programme in any discipline and 55% marks in postgraduate programme.

As per the official website, B.Ed programme is not offered by Jammu University.

Minimum 50% marks is required for admission in B.Ed at IGNOU. I doubt if there is any relaxation based on category.
For details visit: http://www.ignou.ac.in/ignou/aboutignou/school/soe/programmes/detail/90/2.

B.Ed course offered by PDM University, Bahadurgarh is (NCTE) National Council for Teacher Education accredited to NAAC A. Placements and internship opportunities in are negligible.

Yes, you are eligible for B.Ed assuming you have done Bachelor's education prior to pursuing MBA. SMU is recognized university and MBA from SMUDE is also recognized.