On which field has more scope
It totally depends on your interest. According to my point of view, both fields are better. Both fields are quite inter-related to each other. Biotechnology depends on many basic laboratory techniques of microbiology, while further development of microbiology is highly dependent on biotechnological methods, it is actually common to share the same job opportunities, having a Biotechnology degree opens up many more doors, in various fields like industrial processes, management jobs while microbiology jobs are more research-oriented. The staff strives for the overall development of the students and organizes presentations by students to hone their communication skills. Class tests and tutorials are conducted. Study visits to industries, institutes, and organizations are arranged to increase their understanding of workplace requirements and give them exposure to the applications of Microbiology.
Good luck!
Mention which field/s are you asking for?