Which of the following traits typically indicates Obsessive Compulsive Personality Disorder?

Obsessive Compulsive Personality Disorder (OCPD) is primarily characterized by a pervasive pattern of perfectionism and a strong need for orderliness. This trait manifests in an individual's preoccupation with detail, rules, and organization to such an extent that it can interfere with their flexibility and efficiency. Those with OCPD often struggle to adapt their plans or methods and may hold unreasonably high standards for themselves and others, leading to frustration and dissatisfaction in interpersonal relationships as they may be overly critical or demanding.

In contrast, instability in personal relationships is more commonly associated with Borderline Personality Disorder, avoidance of social situations aligns with traits seen in Avoidant Personality Disorder, and difficulty in expressing emotions can be an attribute of several personality disorders, but it is not specific to OCPD. The defining characteristics of OCPD, thus, center significantly around perfectionism and a rigid adherence to rules and order, making this the correct choice in identifying traits indicative of the disorder.