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: Dental
[{'content': 'Developing crossbites are treated by using: \nSelect and explain. \nA. Z spring, B. Tongue blade, C. Crossbite elastics, D. Bite plane', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tongue Blade Therapy\nTongue blade therapy can be employed in developing crossbite, when the maxillary incisor is erupting into crossbite and there is adequate space for the tooth to be moved.', 'role': 'assistant'}]