Assertion (A) : Various psychological disorders are grouped into various classes on the basis of some shared characteristics.

Reason (R) : Classifications are useful because they enable users like psychologists, psychiatrists and social workers to communicate with each other about the disorder and help in understanding the causes of psychological disorders and the processes involved in their development and maintenance.

Both A and R are true, and R is the correct explanation of A.

Both A and R are true, and R is the correct explanation of A.

A classification of such disorders consists of a list of categories of specific psychological disorders grouped into various classes on the basis of some shared characteristics. Classifications are useful because they enable users like psychologists, psychiatrists and social workers to communicate with each other about the disorder and help in understanding the causes of psychological disorders and the processes involved in their development and maintenance.