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': 'The most common form of dissociation hysteria is - \nSelect and explain. \nA. Fugue, B. Amnesia, C. Multiple perosonality, D. Somnambulism', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Dissociative amnesia is the most common type of dissociative disorder.', 'role': 'assistant'}]