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
In exposure and response prevention therapy which one of the following is a poor prognostic factor in OCD? 
Select and explain. 
A. Magical thinking, B. Di contamination, C. Pathological doubt, D. Hoarding
D: Hoarding
Answer: D: Hoarding 
Explanation: Ans:D. Hoarding.