B.Sc

Actually you can't do like this. If you have Masters in maths then cannot go for Ph.D. in Physics without Masters in physics. Similarly you should have maths as core subject to do M.Sc. in maths. Chemistry honours students cannot do maths honours if they don't have maths.

Yes, you can do the NIFT's M.Des and MFM courses after B.Sc. NID is another best option for pursuing the M.Des courses in various disciplines. For more details about the admission please visit the following.
1. For NIFT https://www.nift.ac.in/
2. For NID https://www.nid.edu/

There are not many career opportunities once you graduate with a B.Sc. Microbiology degree. Masters courses in this field are of two years:
Master of Science in Microbiology. Master of Science in Applied Microbiology. Master of Science in Medical Microbiology. Master of Science in Microbial Genetics

B.Sc. In Anaesthesia Technology is a 3-year full-time undergraduate degree course. The eligibility for this course is the 12th or equivalent examination in the Science stream with a minimum of 45% marks in Physics, Chemistry, and Biology
Some of the top institutes which offer admission to B.Sc. In An