This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chronic Kidney Disease & Diabetic Nephropathy, Subject name: Medicine
[{'content': 'All of the following perforating disorders are associated with chronic renal failure EXCEPT: \nSelect and explain. \nA. Reactive perforating collagenosis, B. Calciphylaxis, C. Elastosis perforans serpiginosa, D. Kyrle disease', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Perforating disorders of skin characterized by transepidermal elimination of dermal connective tissue Example* Perforating folliculitis* Kyrle disease* Elastosis perforans serpiginosa* Reactive perforating collagenosis* Acquired perforating dermatosisUsually associated with DM & CRFCalciphylaxis is also seen in patient with CRF but not a perforating disorder', 'role': 'assistant'}]