question: Q:A 2-day-old boy born to a primigravida with no complications has an ear infection. He is treated with antibiotics and sent home. His parents bring him back 1 month later with an erythematous and swollen umbilical cord still attached to the umbilicus. A complete blood cell count shows the following:
  Hemoglobin  18.1 g/dL
  Hematocrit 43.7%
  Leukocyte count 13,000/mm3
  Neutrophils 85%
  Lymphocytes 10%
  Monocytes 5%
  Platelet count 170,000/mm3
  The immunoglobulin levels are normal. The absence or deficiency of which of the following most likely led to this patient’s condition?? 
  {'A': 'CD18', 'B': 'Histamine', 'C': 'Prostaglandin E2', 'D': 'TNF', 'E': 'IL-1'},