This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2018, Subject name: Psychiatry
[{'content': 'Biological marker for antisocial behavior in boys:- \nSelect and explain. \nA. Low serum testosterone, B. Low resting pulse rate, C. Increased urinary dopamine levels, D. Shoened REM latency', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Low hea rate have association with antisocial behavior', 'role': 'assistant'}]