question: Q:A 52-year-old man comes to the physician for a routine health maintenance examination. He feels well. His blood pressure is 125/70 mm Hg. His glomerular filtration rate is calculated to be 105 mL/min/1.73 m2 and glucose clearance is calculated to be 103 mL/min. This patient is most likely being treated with which of the following agents?? 
  {'A': 'Metformin', 'B': 'Canagliflozin', 'C': 'Ifosfamide', 'D': 'Glipizide', 'E': 'Acarbose'},