Biochemistry Which of the following describes humoral hypercalcemia of malignancy (HHM)? A The rise in calcium levels due to PTH-rP B Paraneoplastic Calcitonin Production C Vitamin D Hypervitaminosis D Parafollicular C-cell proliferation of Thyroid Gland 💡 Explanation Which of the following describes humoral hypercalcemia of malignancy (HHM)? ✓ Correct Answer: A. The rise in calcium levels due to PTH-rP