Annamalai University

It's a good course there. No there isn't any discrimination in this two. You can go fearlessly.

Yes. B.Ed is provided through distance also. Annamalai University distance degree is valid throughout and a good choice of studies and it is equally valuable to the normal degree.
I wish you all the best for your choice.

Minimum eligibility to apply for M.Sc in Biotechnology from Annamalai University is that candidate should have a pass mark of 50% in graduation with Mandatory Course : B.Sc. (Biotechnology, Biochemistry, Microbiology, Zoology, Botany).
Admission Process:
Shortlisted candidates will be called for Personal Interview. Candidates are selected based on the performance in Personal Interview. Interested candidates can apply online with required information. Regards.

That totally depends on your choice but I would suggest you to go for B.Ed through correspondence only if you are a working professional.

No, you will not eligible for GATE exam. But, you can do higher studies like PHD and other courses.

Minimum Eligibility to Apply for M.Sc. Physics in Annamalai University is that candidate should have a minimum pass mark of 50% in graduation with mandatory course B.Sc (Physics).
Candidates are selected based on the performance in personal interview. Interested candidates can apply online with the required information.
Regards.