What Is the Main Difference Between Obsessive Compulsive Disorder (OCD)

What is the main difference between Obsessive Compulsive Disorder (OCD) and Obsessive Compulsive Personality Disorder (OCPD) ?

A) People with OCD are more perfectionistic than people with OCPD.
B) People with OCPD are less conscientious about their rituals than people with OCD.
C) People with OCPD do not have true obsessions or compulsions like people with OCD have.
D) People with OCD can do a compulsion once and feel better, people with OCPD never feel better no matter how many times they do them.