The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 40-year-old woman presents to her primary care physician for a checkup. She has felt weaker lately and has lost some weight. She denies any urinary issues. Her BUN at her last visit 4 months ago was 45 mg/dL, and her creatinine was 2.0 mg/dL. Her laboratory studies this visit are seen below:  Hemoglobin: 8 g/dL Hematocrit: 29% Leukocyte count: 9,500/mm^3 with normal differential Platelet count: 197,000/mm^3  Serum: Na+: 139 mEq/L Cl-: 100 mEq/L K+: 5.9 mEq/L HCO3-: 17 mEq/L BUN: 59 mg/dL Glucose: 99 mg/dL Creatinine: 2.3 mg/dL Ca2+: 9.0 mg/dL  Which of the following is the most likely diagnosis?   (A) Acute kidney failure   (B) Chronic kidney failure   (C) Obstructive uropathy   (D) Renal cell carcinoma
['(B) Chronic kidney failure <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Acute kidney failure \n (B) Chronic kidney failure \n (C) Obstructive uropathy \n (D) Renal cell carcinoma <> possible answers', '  A 40-year-old woman presents to her primary care physician for a checkup. She has felt weaker lately and has lost some weight. She denies any urinary issues. Her BUN at her last visit 4 months ago was 45 mg/dL, and her creatinine was 2.0 mg/dL. Her laboratory studies this visit are seen below:\n\nHemoglobin: 8 g/dL\nHematocrit: 29%\nLeukocyte count: 9,500/mm^3 with normal differential\nPlatelet count: 197,000/mm^3\n\nSerum:\nNa+: 139 mEq/L\nCl-: 100 mEq/L\nK+: 5.9 mEq/L\nHCO3-: 17 mEq/L\nBUN: 59 mg/dL\nGlucose: 99 mg/dL\nCreatinine: 2.3 mg/dL\nCa2+: 9.0 mg/dL\n\nWhich of the following is the most likely diagnosis? <> context@']