Physiotherapy

No, you don't need to appear for NEET exam in order to pursue physiotherapy course.

B.Sc biotechnology is a paramedical course and B.P.T is a professional course. It totally depends on your interest. But what I think is you should choose biotechnology because it has lots of scope and opportunity in the future.
All the best.

Geriatric physical therapy: According to world confederation of physical therapy, global population by 2050 is 9.6 billion people among that 2 billion aged 60 and above and 400 million 80 and above. Here comes the scope of geriatric physical therapy in the next few decades, in terms of healthy aging

Dear Adil,
If you want to pursue your career on PGDHRM, you can try at Hospitals, as administrator in the reputed hospital chain of hospitals.
All the best.

Physiotherapy is a very good course. I think, you should pursue this course. It is having very bright future in India as well as in foreign countries.
All the best.