which subject i want to take for biomedical scientist?please help my career

Thankyou for your question.
A biomedical scientist (also known as a biomedical doctor or medical scientist or clinical laboratory scientist) is a scientist trained in biology, particularly in the context of medicine

How do I become a biomedical scientist?
Modern pathology and biomedical laboratory work involves complex and diverse investigations requiring an in-depth scientific knowledge of anatomy, physiology and pathology. So, like for many other professions, a biomedical scientist will need to complete a BSc honours degree course, usually accredited by the Institute of Biomedical Science.
To be accepted onto a degree course you will probably be studying biology and chemistry at ‘A’ Level and already have GCSE mathematics or equivalent.
IBMS-accredited undergraduate biomedical science degrees are designed to give you tailored scientific knowledge and training to enter the profession. Most honours degree courses are full-time, often with an integrated placement in the laboratory. Part-time options are also available which allow you to combine your studies with some practical experience, for example as a trainee in a hospital laboratory.
There is a non-standard route for other science graduates with science degrees containing the principle subjects of anatomy and physiology, biochemistry, molecular biology, immunology and medical microbiology. Graduates with these degrees can enter the profession but may need to supplement their degrees with additional modules that are an integral part of accredited biomedical science degree courses.
All the best for your future