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': 'The preferred drug for treating attention deficit hyperactivity disorder in a 6 year old boy, whose father has a history of substance abuse:- \nSelect and explain. \nA. Methylphenidate, B. Atomoxetine, C. Clonidine, D. Dexamphetamine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Attention deficit hyperactivity disorder - Boys > girls Age : 5 to 12 years Clinical features Inattention Hyperactivity Impulsiveness - often has troubles waiting one's turn Rx Stimulants - Methylphenidate (DOC) Dexmethylphenidate Non stimulants - Atomoxetine- If history of substance abuse", 'role': 'assistant'}]