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': '46 years old male Ashwath, comes to your OPD and while giving history suddenly becomes blank and blames that your stole his thoughts. Diagnosis \nSelect and explain. \nA. Thought block, B. Thought withdrawal, C. Neologism, D. Perseverration', 'role': 'user'}, {'content': 'Answer: B \nExplanation: It is a disorder of thought possession.', 'role': 'assistant'}]