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': 'Sign of oppositionalism in a young child is due to? \nSelect and explain. \nA. Mental retardation, B. Organic mental disorder, C. Mental distress, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. Mental distress"Oppositionalism, temper tantrums and breath holding spells are not unusual during 1st years of life and are age typical expression of frustration and anger"', 'role': 'assistant'}]