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: Pediatrics
[{'content': 'All of the following are preschool age problems EXCEPT: March 2013 (b, c, d) \nSelect and explain. \nA. Sleeping disorde, B. Temper tantrum, C. Pica, D. Stuttering', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Temper tantrum Temper tantrum reaches its peak point during second and third year of life and gradually subsides in between 3-6 years as the child learns to control his negativism and complies to the request of others', 'role': 'assistant'}]