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
[{'content': 'Which of the following defense mechanisms are seen in obsessive compulsive disorder\n i) Reaction formation \n ii) Undoing \n iii) Dissociation \n iv) Isolation of affect \nSelect and explain. \nA. All are present, B. I, II, & III are present, C. I, II & IV are present, D. II & IV are present', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Reaction formation, Undoing, Isolational affect, Displacement and Inhibition are the defense mechanisms associated with obsessive compulsive disorder.\nDissociation is seen with Dissociative disorders.', 'role': 'assistant'}]