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': 'Most commonly associated with Conn&;s syndrome \nSelect and explain. \nA. Coical carcinoma, B. Pheochromocytoma, C. Coical adenoma, D. Bilateral micronodular adrenal hyperplasia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The most common cause of mineralocoicoid excess is primary aldosteronism bilateral micronodular hyperplasia some what more common than unilaterl adrenal adenoma( Ref Harrison 20 th edition)', 'role': 'assistant'}]