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
[{'content': 'Bruxism is: NEET 13 \nSelect and explain. \nA. Walking during sleep, B. Nocturnal enuresis, C. Grinding of teeth during sleep, D. Sleep apnea', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Grinding of teeth during sleep', 'role': 'assistant'}]