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
One of the following is not true about melatonin: 
Select and explain. 
A. Induces sleep, B. Used in treatment of jet lag syndrome, C. Is secreted by pituitary, D. Is a pineal hormone
C: Is secreted by pituitary
Answer: C: Is secreted by pituitary 
Explanation: None