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
A 7-year-old child has normal occlusion except for lingually
erupting maxillary central incisor. He should be treated with: 
Select and explain. 
A. Crossbite elastic, B. Tongue blade therapy, C. Maxillary acrylic inclined plane, D. Myofunctional therapy
B: Tongue blade therapy
Answer: B: Tongue blade therapy 
Explanation: Tongue Blade Therapy
Tongue 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.