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
If a tooth has abnormal mobility, but is not displaced from the socket it is termed as: 
Select and explain. 
A. Concussion, B. Subluxation, C. Extrusive luxation, D. Partial avulsion
B: Subluxation
Answer: B: Subluxation 
Explanation: Subluxation

Teeth are sensitive to percussion and have some mobility.
Sulcular bleeding is seen showing damage and rupture of the periodontal ligament fibers.
Pulp responds normal to testing.
Tooth is not displaced.