This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
This patient had hypercalcemia with a suppressed parathyroid hormone level. What is the diagnosis? 
Select and explain. 
A. Hodgkin's lymphoma, B. Hyperthyroidism, C. Parathyroid carcinoma, D. Small-cell lung cancer
A: Hodgkin's lymphoma
Answer: A: Hodgkin's lymphoma 
Explanation: Answer A. Hodgkin's lymphomaBilateral hilar lymphadenopathy with hypercalcemia and a suppressed parathyroid hormone level is most consistent with Hodgkin's lymphoma, which is associated with unregulated activation of vitamin D.