Hello Bindu,
Computer scienceis the study of processes that interact with data and that can be represented as data in the form ofprograms. It enables the use of algorithms to manipulate,store, and communicate digital information. A computer scientist studies the theory of computationand the practice ofdesigning software systems. The jobs available for this are software engineer like most of the people choose.
Business:
Business engineering focuses on developing innovative business solutions that take asociotechnical systems(STS) approach. The STS approach addresses an enterprise as a total system in the same manner as an airplane system or an industrial facility, since they possess a similar level of complexity.

Business engineering combines knowledge in the fields of business administration, Industrial Engineering, as well as information technology and connects it to all aspects of transformation, from means of presentation toprocess modelsto cultural and political considerations.
GOOD LUCK!