This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': "All of the following are associated with Atrioventricular block, except: \nSelect and explain. \nA. Hyperkalemia, B. Hypomagnesemia, C. Hypothyroidism, D. Cushing's syndrome", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Adrenal insufficiency is associated with Atrioventricular Block (Not cushing&;s syndrome). Metabolic/Endocrine Causes of AV Block: Hyperkalemia Hypermagnesemia Hypothyroidism Adrenal Insufficiency Ref: Harrison 19th edition Pg no: 1471', 'role': 'assistant'}]