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
'Sleep apnea' is defined as a temporary pause in breathing during sleep lasting at least? 
Select and explain. 
A. 40 seconds, B. 30 seconds, C. 20 seconds, D. 10 seconds
D: 10 seconds
Answer: D: 10 seconds 
Explanation: 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.