Final answer:
Patients with primary hyperparathyroidism typically exhibit hypercalcemia and hypophosphatemia.
Step-by-step explanation:
The question asked about the electrolyte imbalances observed in patients with primary hyperparathyroidism. The correct answer is D. Hypercalcemia, hypophosphatemia. In primary hyperparathyroidism, the parathyroids produce too much hormone, which leads to high levels of calcium in the blood, or hypercalcemia, and bone destruction. The raised calcium levels lead to increased excretion of phosphate by the kidneys and subsequently lower serum phosphate levels or hypophosphatemia. Thus, patients with primary hyperparathyroidism commonly present with abnormally high blood levels of calcium and abnormally low blood levels of phosphate.