Medicine Which of the following tests is used to distinguish Primary Hyperparathyroidsm from Familial Benign Hypercalcemia: A Serum PTH Levels B Srum Calcium levels C Urinary Calcium levels D Serum Phosphorus levels 💡 Explanation Which of the following tests is used to distinguish Primary Hyperparathyroidsm from Familial Benign Hypercalcemia: ✓ Correct Answer: C. Urinary Calcium levels