This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cystic fibrosis & Sleep apnea, Subject name: Medicine
[{'content': "'Sleep apnea' is defined as a temporary pause in breathing during sleep lasting at least? \nSelect and explain. \nA. 40 seconds, B. 30 seconds, C. 20 seconds, D. 10 seconds", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Apneas in OSA are defined in adults as breathing pauses lasting >10 s assosciated with 3% decrease SaO2 Hypopneas is defined as >30% decrease in airflow for >10 sec associated with 3% decrease in SaO2.', 'role': 'assistant'}]