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': 'A 7-year-old child has normal occlusion except for lingually\nerupting maxillary central incisor. He should be treated with: \nSelect and explain. \nA. Crossbite elastic, B. Tongue blade therapy, C. Maxillary acrylic inclined plane, D. Myofunctional therapy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tongue Blade Therapy\nTongue blade therapy can be employed in developing\xa0crossbite, when the maxillary incisor is erupting\xa0into crossbite and there is adequate space for the\xa0tooth to be moved.', 'role': 'assistant'}]