This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
[{'content': 'Mobitz type 2 second degree AV block is seen in all except: \nSelect and explain. \nA. Hypothyroidism, B. Coronary Aery Disease, C. Sarcoidosis, D. Cushing syndrome', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Delay or lack of conduction through the atrioventricular (AV) node and below has multiple causes. Degenerative changes (eg, fibrosis, calcification, or infiltration) are the most common cause of nonischeamic AV block. Idiopathic fibrosis or calcification of the AV conduction system, commonly seen in the elderly, can cause complete AV block. Causes of Mobitz type 2 second degree AV block are - Damage of the conduction system from coronary aery disease, valve surgery, myocardial infarction, myocarditis, infiltrative cardiomyopathies (sarcoidosis, hemochromatosis), myxedema, Lyme disease, neuromuscular disease, and AV junction ablation REF : HARRISONS 21ST ED', 'role': 'assistant'}]