Assertion: At present, the most widely practiced therapy is Cognitive Behaviour Therapy (CBT) for treating various psychological disorders.

Reasoning: Cognitive Behaviour Therapy has been extensively researched and proven to be a successful treatment for various psychological disorders, including anxiety, depression, panic attacks, and borderline personality disorder.

Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A.

Currently, the most widely practiced therapy is Cognitive Behaviour Therapy (CBT), which has been extensively researched and proven to be a successful treatment for various psychological disorders, including anxiety, depression, panic attacks, and borderline personality disorder. CBT takes a comprehensive approach to understanding psychopathology, considering biological, psychological, and social factors. It integrates cognitive therapy, which focuses on thoughts and beliefs, with behavioral techniques.