The correct option is B. Psychology.
Psychology is a science, more specifically a social science. The social or human sciences are the set of studies that deal with people and society, which are differentiated from the natural sciences by the practical application of laws or scientific theories.
Because of its analytical characteristics, we can consider that psychology is eather a science or a scientific discipline.
Today, there are many branches of psychology, some are considered social sciences and other health sciences. Both coexist and can be helpful in the therapeutic process.