This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Substance Related and Addictive Disorders, Subject name: Psychiatry
[{'content': 'Type B alcohol dependence is associated with all except ? \nSelect and explain. \nA. Severe dependence, B. Late onset, C. Many childhood risk factors, D. Polysubstance abuse', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Alcohol dependence Type A Type B Late onset Early onset Few childhood risk factors Many childhood risk factors Mild dependence Severe dependence Few alcohol related problems Frequent polysubstance abuse', 'role': 'assistant'}]