hi umesh ,

Both have good opportunities, point is what you like more, that matters.

Ultimately its your call what you want to do in future.

Keep in mind, all the life science subjects are complementary to each other, whatever degree you will acquire, you need to grab knowledge of all subject for better understanding of life science.

1. Biochemistry

• Teaching
• Pharmaceutical qa/qc
• Research
• Life science products marketing

2. Microbiology

• Teaching
• Research
• Microbiologist pharma/food/water q.a /q.c
• Life science product marketing
• Pathology lab

all the best