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
The gingival crevicular fluid is increased in all except: 
Select and explain. 
A. Gingivitis, B. Smoking, C. Periodontal pocket, D. Trauma from occlusion
D: Trauma from occlusion
Answer: D: Trauma from occlusion 
Explanation: None