This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Personality disorders, Subject name: Psychiatry
Abnormal thought possession is found in 
Select and explain. 
A. Organic brain syndrome, B. Hysteria, C. Obsessive compulsive disorder, D. Neuroasthenia
C: Obsessive compulsive disorder
Answer: C: Obsessive compulsive disorder 
Explanation: Normally one experience's one's thinking as being one's own, although this sense of personal possession is never in the foreground of one's consciousness. One also has the feeling that one is in control of one's thinking. This loss of control is seen in obsessions. Ref- Fish psychopathology, 3e, pg 36.