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
A feeling of detachment from self and feeling of being an external observer of his body is suggestive of: 
Select and explain. 
A. Dissociative fugue, B. Dissociative identity disorder, C. Depersonalization, D. Trance
C: Depersonalization
Answer: C: Depersonalization 
Explanation: Depersonalization / Derealisation is a type of dissociative disorder where patient feels detached from himself and world. He feels as if he is an external observer of his body.