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
[{'content': 'A software engineer had financial losses. After that he went to a new place  and changed his name and started the career as a cab driver. He had no knowledge about his past life. Diagnosis: \nSelect and explain. \nA. Ganser syndrome, B. Dissociative amnesia, C. Dissociative fugue, D. Dissociative identity disorder', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Dissociative fugue is characterized by sudden, unexpected journey away from home to a new place and assuming a new identity with inability to recall past.', 'role': 'assistant'}]