A 64-Year-Old Man Comes to the Office with Fatigue

A 64-year-old man comes to the office with fatigue.  He has hypertension and poorly controlled diabetes complicated by nephropathy and peripheral neuropathy.  His renal function has declined steadily over the last few years.  On examination, his conjunctivae are pale and he has bilateral 1+ peripheral edema.  Laboratory results are as follows: On the graph below, area "C" shows the normal relationship between serum concentrations of free calcium and parathyroid hormone.  Which of the following areas most likely represents this patient's current metabolic state?

A) A
B) B
C) C
D) D
E) E

Correct Answer:

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