M.Sc

Yes, you can go for MBA in Health Management. But, you already have Masters in science. So, Masters in business administration is not looking in line with the past record. If you have a keen interest in Business, surely, you can go for it.

Admission in M.Sc degree at IIT is by examination JAM. There is no There is no age restriction of age for appearing in examination. You may refer to following link for further details: http://js2.iitd.ac.in/html/index.php

Genetics is a good option if you are really interested in it. Or, go for chemistry as it has good scope.

I think the date for filling the CET forms is not declared on the website yet. I am also looking for MA English in Punjab University. The exam would be held on 10-11 June on 2017. And, the syllabus for PU CET PG is verbal, reasoning, general knowledge and IT.
Best of Luck.

Hello,
Thanks for asking.
Well, both fields have different but good career scope. M.Sc can provide you a way to research or lectureship career, study about the science, where MBA will help you to increase your knowledge deeper.
If you want to make career in science & science is your passion, then definitely, you should go for M.Sc.
But, if you to make career in business, then I will personally suggest you that don't pursue M.Sc just do MBA & make career in that.
I hope it will help you.
Best of Luck :)