question: Q:A 34-year-old woman, who had her first child 2 weeks ago, visits her family physician with concerns about constant fatigue and difficulty with breastfeeding. She was discharged from the intensive care unit after hospitalization for severe postpartum hemorrhage. Since then, she has tried multiple pumps and self-stimulation to encourage breast milk production; however, neither of these strategies has worked. Her blood pressure is 88/56 mm Hg and heart rate is 120/min. Which of the following best explains the underlying condition of this patient?? 
  {'A': 'Pituitary infarction', 'B': 'Pituitary stalk epithelial tumor', 'C': 'Pituitary infection', 'D': 'Pituitary hemorrhage', 'E': 'Pituitary infiltration by histiocytes'},