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': 'By which alcohol dependence is best indicated - \nSelect and explain. \nA. Black outs, B. Early morning drinking, C. Withdrawal symptoms, D. Physical dependence', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Amongst the given options only withdrawal syndrome is one of the diagnostic criteria.', 'role': 'assistant'}]