The answer is industrial and organizational.
Personality psychology focuses on individual differences in behavior, emotion, and thought patterns. It is not primarily concerned with personnel matters or human resource management.
Health psychology deals with how psychological, behavioral, and cultural factors contribute to physical health and illness. It does not focus on personnel or human resource management.
Industrial and organizational (I/O) psychology is the branch of psychology that studies human behavior in workplace settings. It is directly concerned with personnel matters and human resource management, including recruitment, selection, training, performance appraisal, and employee motivation.
Clinical and counseling psychology focuses on diagnosing and treating mental health issues and providing therapy. While it may involve some aspects of workplace stress or employee assistance programs, it is not primarily focused on personnel or human resource management.