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: Pharmacology
Increased tendency to fall asleep at night without causing CNS depression is a property exhibited by 
Select and explain. 
A. Pyridoxine, B. Diphenhydramine, C. Melatonin, D. Ethanol
C: Melatonin
Answer: C: Melatonin 
Explanation: None