Zoology

Dear,
As per your query, you may consider these options:
Microbiology
Environment Science
Wildlife Science
Psychology
Stem cell
Nanoscience
forensic Science
Special Education
Horticulture
All the best!

Both have scope and graduate from any discipline can apply for the government jobs.

To make a good career in banking and finance, ddopt comparatively tough path i.e. try to qualify different banking exams like PO. Government banks already offer graduate management programms to all aspirants. You will have a successful career thereafter. All the best.

B.Sc in zoology is not for below average students.

Dear,
If you don't want to enter into teaching job, you can enter into research field. And, for that, you need to invest approximately 7-8 years in studies.
If you don't want to invest much and not interested in research, you may consider Psychology as a option.
Do research on given topic and choose the way accordingly.
All the best.

All the courses you mentioned in your question has a good scope, just select any subject of your choice and field in which you want to make your career.

Chances are always subject to research qualifications and it doesn't matter which subject you choose. So, excel first in research.