Understand that the question asks for the most commonly used structured clinical interview specifically designed to assess personality disorders in adults.
Review the options provided: Structured Clinical Interview for DSM Disorders (SCID-II), Minnesota Multiphasic Personality Inventory (MMPI-2), Beck Depression Inventory (BDI), and Hamilton Anxiety Rating Scale (HAM-A).
Recognize that the SCID-II is a semi-structured interview designed to diagnose DSM personality disorders, making it a direct tool for this purpose.
Note that the MMPI-2 is a personality assessment inventory but not a structured clinical interview; it is a self-report questionnaire used for broader personality and psychopathology assessment.
Understand that the BDI and HAM-A are symptom rating scales for depression and anxiety respectively, and are not used for diagnosing personality disorders.