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
[{'content': 'True statement about Melatonin are all EXCEPT: \nSelect and explain. \nA. Secreted by pituitary gland, B. Secreted by pineal gland, C. Associated with sleep mechanism, D. Can be used to treat jet lag', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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.', 'role': 'assistant'}]