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Yes, you could choose between any life science courses you want. Assuming you have two reasons to change field:-
1. Thinking that no job opportunities for a Bachelor degree and/or for microbiology
2. Recently developed an interest in food technology, so you could pursue Ph.D or get a dream job in the same domain (or you decided to join with friends pursuing food technology).
However, if you still have interest in microbiology, there are definitely varied opportunities for microbiologists. Instead of doing M.Sc, you could do a job oriented Diploma course like certificate program in quality control microbiology, one such course is offered by the big player pharma company based in Bangalore.
Once after securing job and gaining few yrs of experience, where you have real experience to learn not just food tech but also about other career opportunities. Also to interact and learn from the scientists and team members. Well, you could take a call that time. You could quit job to follow your dream, of if you decided to do Ph.D, many companies like Biocon, Dr Reddy's offer research program for the employees.
Good luck!

The details about the B-Schools you asked are given under for making the better decision.
A) IBS, Hyderabad admission in MBA programs are based on academic qualifications and experience. The placement statistics of IBS, Hyderabad are as under for year 2017.
1. Average Salary= 6.9
2. The highest Salary Domestic= 16.50
3. International salary= 47.50
4. Average Salary (Top 10%)= 12.40
5. Average Salary (Top 25%)= 9.95
6. On Campus placement = 94%
7. Ranking 10th by Career 360 in 2017.
B) SIMS Pune:- The admission are based on SNAP entrance test followed by GD and PI. The placement statistics of SIMS are as under for year 2018.
1. The highest CTC 16.3 LPA
2. Top 150 Students got an average CTC of 10.16 LPA
3. 92.8 % Placement in 30 days
4. Ranking 3rd for MBA Executive programme by CSR GHRDC in 2017
C) SIOM, Nashik :- This eligibility criteria of this B-Schools is B.E/B.Tech with 50% of marks+ SNAP entrance test followed by What, GD and PI as MBA operation. The placement statistic are as under.
1. Students placed so far for batch 2017-2019 = 96%
2. Average CTC= 10.80 L
3. Median CTC= 10.99 L
4. The highest CTC= 19.5 L
5. Award - Pride of Maharashtra Award under the category of Best Institute of the Year Award 2018 to SIOM
6. Ranking :- 16th by Career 360
The B-Schools mentioned at S. No. 2 and 3 are very attractive but my choice is A.