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: Forensic Medicine
Bruxism is: NEET 13 
Select and explain. 
A. Walking during sleep, B. Nocturnal enuresis, C. Grinding of teeth during sleep, D. Sleep apnea
C: Grinding of teeth during sleep
Answer: C: Grinding of teeth during sleep 
Explanation: Ans. Grinding of teeth during sleep