This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'A person presented with swelling of the right 3rd toe. X ray shows deposition of multiple crystals. A defect in which of the following pathway caused the problem. \nSelect and explain. \nA. Purine salvage pathway, B. Uric acid pathway, C. Urea cycle, D. CORI cycle', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The probable diagnosis is gout . Gout is the most common inflammatory ahritis in men and in older women. It is caused by deposition of monosodium urate monohydrate crystals in and around synol joints due to abnormal purine metabolism . Ref Davidsons 23e p1013', 'role': 'assistant'}]