This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pharmacology
FDA approved the use of modafinil as an adjunct in 
Select and explain. 
A. Sleep apnea, B. Narcolepsy, C. Depression with lethargy, D. Tourette's syndrome
A: Sleep apnea
Answer: A: Sleep apnea 
Explanation: For obstructive sleep apnea the treatment of choice: Continuous positive airway pressure.Adjunct: Modafinil which is a sympathomimetic agonist for alpha and beta receptors.Ref: