Hi chandan

B.Sc (program) or simply is a three-year undergraduate academic degree, designed to provide the students with foundation knowledge possible for a science-based career.

This program facilitates a large range of career possibilities

It provides a broad foundation in the sciences, with a special focus on multidisciplinarity

Whereas

B.Sc (Hons) in India is generally a three-year degree program which develops advanced theoretical and research skills.

It helps in building an advanced professional or academic career

It is an appropriate course for students who wish to pursue Master of Science (M.Sc) or Doctor of Philosophy (PhD) and a research or academic career

This program facilitates students who wish to pursue an independent research project in an area of interest under the supervision of an academic staff member

So the difference is very much in front of you . You can chose according to your convenience and interest

All the best
I hope I was helpful