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: Physiology
[{'content': 'Adrenaline is secreted by ? \nSelect and explain. \nA. Anterior pituitary, B. Posterior pituitary, C. Adrenal coex, D. Adrenal medulla', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Adrenal medulla", 'role': 'assistant'}]