This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Obsession is a disorder of thought 
Select and explain. 
A. Content, B. Perception, C. stream, D. possession
D: possession
Answer: D: possession 
Explanation: obsession is a disorder of thought possession the very impoant question that is asked under the subject of psychiatry is regarding obsession the impoant qualities of obsession that as to be taken from the case scenario related questions are RECCURRENT IRRELEVANT INTRUSIVE IRRESSISTABLE DISTRESSING EGO DYSTONIC THOUGHTS. Ref. kaplon and sadock, synopsis of psychiatry, 11 th edition, pg.192