This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
[{'content': 'Modafinil is approved by FDA for treatment of all, except: \nSelect and explain. \nA. Narcolepsy, B. Shift work syndrome (SWS), C. Obstructive sleep apnea syndrome (OSAS), D. Lethargy in depression', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Modafinil is an FDA approved drug in the treatment of obstructive sleep apnea, shift work disorder and narcolepsy. It is not FDA approved in the treatment of lethargy in major depression. Ref: Sleepiness: Causes, Consequences and Treatment By Michael J. Thorpy, Pages 415-6', 'role': 'assistant'}]