This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology metabolism, Subject name: Physiology
True statement about Melatonin are all EXCEPT: 
Select and explain. 
A. Secreted by pituitary gland, B. Secreted by pineal gland, C. Associated with sleep mechanism, D. Can be used to treat jet lag
A: Secreted by pituitary gland
Answer: A: Secreted by pituitary gland 
Explanation: Ans. A Secreted by pituitary glandRef: Ganongs 24th ed. pg. 278; Guyton pg. 1009-1010* Melatonin is secreted by pinealQ gland. Its synthesis and secretion is increased remarkably in the dark period of the day and maintained at low levels in the daylight.* It is associated with sleep mechanism.* Melatonin based drugs can be used to treat jet lag and insomnia in elderly.* It also acts as inhibitor of gonadotropic hormone secretion and the gonads become inhibited and even partly involuted.