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
In periodontal compromised tooth, which tooth movement is done carefully: 
Select and explain. 
A. Uprighting, B. Intrusion, C. Proclination, D. Retroclination
B: Intrusion
Answer: B: Intrusion 
Explanation: None