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
Stippling of gingiva indicates all, EXCEPT 
Select and explain. 
A. Surface keratinisation, B. Healthy gingiva, C. Adaptive specialization for reinforcement of function, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: None