question: Q:A 42-year-old man comes to the physician for a follow-up examination 1 week after he passed a renal calculus. X-ray crystallographic analysis of the calculus showed calcium as the primary cation. Physical examination today shows no abnormalities. A 24-hour collection of urine shows increased calcium excretion. Which of the following is the most appropriate pharmacotherapy?? 
  A:Carbonic anhydrase inhibitor;B:Na+ –Cl− symport inhibitor;C:Na+ –K + –2Cl− symport inhibitor;D:Osmotic diuretic