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: Medicine
[{'content': "Conn's syndrome is characterized by - \nSelect and explain. \nA. Hyperinsulinism, B. Hypehyroidism, C. Hypoadrenalism, D. Hyperaldosteronism", 'role': 'user'}, {'content': "Answer: D \nExplanation: Conn syndrome refers specifically to primary hyperaldosteronism due to the presence of an adrenal aldosteronoma (aldosterone-secreting benign adrenal neoplasm or aldosterone producing adenoma (APA)). It is characterised by low renin and high aldosterone levels. Reference : page 780 Davidson's Principles and practice of Medicine 22nd edition", 'role': 'assistant'}]