Hy Sneha!! 

Bachelor of arts is a degree which offers a lot of subject combinations. There are lot many subjects in ba which you can opt with economics also. Such as 

Political science

Public administration

Psychology

Sociology

English literature

History

Maths

Geography

Philosophy 

These are the subjects which you can take along with economics in ba 

fundamentals of economics , market and government in a modern economy, basic elements of demand and supply, overview of micro and Macro economy, structure of the Indian economy , demography , agriculture , industry , services etc. Topics are included in economics in ba.

Hope your query is solved

Good luck !!