A 39-year-old man comes to the physician for a 2-day history of cola-colored that has been very alarming. There is no associated pain and no recent infections. He also has had a 4-month history of intermittent dry cough that occasionally produces a rust-colored saliva. There is no past medical history. Vitals are normal. A biopsy finding from a similar patient is shown.

Which of the following immunologic processes is most similar to this patient’s pathophysiology?
A) Arthus reaction
B) Bee sting reaction
C) Pernicious anemia
D) Post-streptococcal glomerulonephritis
E) Rhus dermatitis

