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: Physiology
[{'content': 'Slow wave sleep associated with \nSelect and explain. \nA. Dreams, B. Cardiac arrhythmia, C. Penile intumescence, D. Delta activity', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Slow wave sleep events (Stage 3 & 4 NREM)\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Somnambulism\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Night terrors\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Nocturnal enuresis\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Bruxism\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Sleep talking\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Delta rhythm- Deep sleep (Stage 3 & 4 NREM)', 'role': 'assistant'}]