What should I do after completing B.Sc in biotechnology to get a good job and salary- MBA or M.Sc?

If salary is considered, then MBA will be best for you.

Hello, MBA in Biotechnology: MBA in Biotechnology is also a good option but only for those having interest in marketing, business and management can go for it. It is also 2 years programme. Clinical research/Regulatory Affairs & Bioinformatics. You can do M.Sc or PG Diploma course in clinical res

This would depend on your interest areas and career aspirations. In case you intend to pursue a career in Technical / research / academics area then M.Sc. Is better, However if you want to move into general management the MBA is better.