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
[{'content': "FDA approved the use of modafinil as an adjunct in \nSelect and explain. \nA. Sleep apnea, B. Narcolepsy, C. Depression with lethargy, D. Tourette's syndrome", 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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:', 'role': 'assistant'}]