This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
Therapy of choice for sleep-apnea syndrome is 
Select and explain. 
A. Invasive ventilation, B. Non - Invasive ventilation, C. Oxygen inhalation, D. Use of respiratory stimulants
B: Non - Invasive ventilation
Answer: B: Non - Invasive ventilation 
Explanation: Harrison's principles of internal medicine 17th edition. * Majority of patients need to use continuous positive airway pressure(CPAP) delivered by a nasal mask every night to splint the upper airway open.