I want to pursue a cosmetic company, after B.Sc. in biotechnology, what course should I select for that in my Master's.

After B.Sc. Biotechnology, you can consider pursuing a PG Diploma in Lab Technician, Bioinformatics, Life Sciences. If you are aiming for Masters you can pursue M.Sc. In Toxicology, Botany, Microbiology, Public Health, Applied Biology Virology, Nanotechnology, Pharmacology. We hope this helps.