*1.Q1. Which ONE of the following statements is INCORRECT?(Required.)

A. Sleep bruxism and awake bruxism are two distinct circadian manifestations of bruxism.

B. A forceful closure of opposing teeth in a static relationship between the mandible and maxilla, either in maximum intercuspation or an eccentric position is usually regarded as clenching.  

C. Bruxism peaks in older adults aged ≥60 years. 

D. Sleep bruxism in children has shown a trend for decreasing prevalence with age and absence of gender differences.