This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
[{'content': 'ACTH secretion is inhibited by \nSelect and explain. \nA. Aldosterone, B. Epinephrine, C. Glucocoicoids, D. CRH', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Glucocoicoids inhibit ACTH secretion by a direct negative feedback mechanism. They also inhibit CRH secretion. Ref: Guyton and Hall 13th edition Pgno: 977', 'role': 'assistant'}]