A 49-year-old man is brought to emergency after being found on a bench in a park by police. He appears disheveled. Serum potassium is 3.2 mEq/L; serum calcium is 8.0 mg/dL. Which of the following is most likely to be seen in this patient?
A) ↑ Serum magnesium; ↑ Serum parathyroid hormone (PTH); ↑ Renal Outer Medullary K+ (ROMK) activity
B) ↑ Serum magnesium; ↑ Serum PTH; ↓ ROMK activity
C) ↑ Serum magnesium; ↓ Serum PTH; ↑ ROMK activity
D) ↑ Serum magnesium; ↓ Serum PTH; ↓ ROMK activity
E) ↓ Serum magnesium; ↑ Serum PTH; ↑ ROMK activity
F) ↓ Serum magnesium; ↑ Serum PTH; ↓ ROMK activity
G) ↓ Serum magnesium; ↓ Serum PTH; ↑ ROMK activity
H) ↓ Serum magnesium; ↓ Serum PTH; ↓ ROMK activity
