Hi Debasish..Different College have different procedure for admission in B.Sc Economics (Hons.). You didn't mentioned the name of your College nor where you want to study. So I can't exactly answer your question. Admission screening vary from College to College and University to university. Some Colleges/Universities accept entrance exam where as some demand for cutoff merit based on board marks.

Some of the entrance exam for B.Sc Economics ( Hons.) are as ahead.

National Eligibility Test

Banaras Hindu University Entrance Test

Mumbai University Entrance Test

Pune University Entrance Test

Symbiosis School of Economics

Minimum eligibility to appear for B.Sc Economics is 10+2 or intermediate with Science stream from recognized board.

You can also apply for more advance course such as B.Sc+ M.Sc Economics available in Birla Institute Of Technology and Science (Bits )Pilani.

Hope your query is resolved.

All the best.