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': 'A 9 years old child is restless. He is hyperactive and his teacher complains that he does not listen to the teachings, disturbs other students he also shows less interest in playing. The likely diagnosis is : \nSelect and explain. \nA. Cerebral palsy, B. Attention decit hyperkinetic child, C. Delirium, D. Mania', 'role': 'user'}, {'content': "Answer: B \nExplanation: Hyperkinetic attention deficit disorder\nis a common disorder of school-age children\n6-8 times more common in males*\xa0\nClinical features\n\nA) Poor attention span with distractibility\ni. fail to finish the things started.\nii. Shifts from uncompleted activity to other\niii. doesn't listen to others\niv. often looses thing\nB) Hyperactivity\n\nFidgety\ndifficulty in sitting at one place for long.\ninterferes with other peoples activities\n\nImpulsivity\n\nacts before thinking\ndifficulty in waiting for his turn", 'role': 'assistant'}]