This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
Which of the following defense mechanisms are seen in obsessive compulsive disorder
 i) Reaction formation 
 ii) Undoing 
 iii) Dissociation 
 iv) Isolation of affect 
Select and explain. 
A. All are present, B. I, II, & III are present, C. I, II & IV are present, D. II & IV are present
C: I, II & IV are present
Answer: C: I, II & IV are present 
Explanation: Reaction formation, Undoing, Isolational affect, Displacement and Inhibition are the defense mechanisms associated with obsessive compulsive disorder.
Dissociation is seen with Dissociative disorders.