Which of the following defense mechanisms are seen in obsessive compulsive disorder
 i) Reaction formation 
 ii) Undoing 
 iii) Dissociation 
 iv) Isolation of affect
All are present
I, II, & III are present
I, II & IV are present
II & IV are present
Reaction formation, Undoing, Isolational affect, Displacement and Inhibition are the defense mechanisms associated with obsessive compulsive disorder.
Dissociation is seen with Dissociative disorders.