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
Single tooth cross bite can be treated by: 
Select and explain. 
A. Removable or fixed appliances, B. Expansion appliance, C. Extraoral elastic, D. Head gear
A: Removable or fixed appliances
Answer: A: Removable or fixed appliances 
Explanation: None