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': 'Biological marker for antisocial behavior in boys is : \nSelect and explain. \nA. Low serum testosterone, B. Shortened REM latency time, C. Low resting pulse rate, D. Increased urinary dopamine levels', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Low resting pulse rate is the constant predictor of conduct and antisocial behavior.', 'role': 'assistant'}]