question: Q:A 53-year-old man presents with swelling of the right knee. He says that the pain began the previous night and was reduced by ibuprofen and an ice-pack. The pain persists but is tolerable. He denies any recent fever, chills, or joint pains in the past. Past medical history includes a coronary artery bypass graft (CABG) a year ago for which he takes aspirin, atorvastatin, captopril, and carvedilol. The patient reports a 20-pack-year history of smoking but quits 5 years ago. He also says he was a heavy drinker for the past 30 years but now drinks only a few drinks on the weekends. On physical examination, the right knee is erythematous, warm, swollen, and mildly tender to palpation. Cardiac exam is significant for a mild systolic ejection murmur. The remainder of the examination is unremarkable. Arthrocentesis of the right knee joint is performed, which reveals the presence of urate crystals. Which of the following medications is most likely responsible for this patient's symptoms?? 
  {'A': 'Aspirin', 'B': 'Vitamin C', 'C': 'Carvedilol', 'D': 'Atorvastatin', 'E': 'Captopril'},