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
Which of the following is not the period of physiological raising of the bite according to Martin and Schwarz 
Select and explain. 
A. Eruption of 6th year molar, B. Eruption of 12th year molars, C. Eruption of 18th year molars, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: Bruxism synonym.
Neuralgial traumatic (Karolyl)
Karolyi effect (Weskit)
Occlusal habit neurosis (Tischer)
Parafunctional occlusal habit (Drum)
According to Ramjford and Ash, BRUXISM is triggered by: Emotional tensions Occlusal maladjustment Pain / discomfort