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
True about obsession - compulsive disorder are A/E - 
Select and explain. 
A. Ego-alien, B. Patient tries to resist against, C. Ego syntonic, D. Insight is present
C: Ego syntonic
Answer: C: Ego syntonic 
Explanation: OCD is ego-dystonic (not egosyntonic).
Characteristic features of obsession & compulsion 

They are egoalien, i.e. experienced as foreign to person's experience of himself.
They are egodystonic, i.e. (unwanted behavior).
Thought is recognized as irrational and absurd (insight is present)
Patient tries to resist against it however patient is unable to do so (thought is irresistible) → Inability to resist causes marked distress or anxiety.