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
Concussion implies luxation injury 
Select and explain. 
A. Without displacement and normal mobility, B. Without displacement and increased mobility, C. Displacement in an apical direction, D. Displacement in a coronal direction
A: Without displacement and normal mobility
Answer: A: Without displacement and normal mobility 
Explanation: None