This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Chronic thiazide therapy causes persistent hypercalcemia due to - 
Select and explain. 
A. Renal tubular acidosis, B. Fanconi's syndrome, C. Hypervitaminosis D, D. Hyperparathyroidism
D: Hyperparathyroidism
Answer: D: Hyperparathyroidism 
Explanation: Ans. is d i.e., Hyperparathyroidism o Chronic thiazide therapy causes hypercalcemia because it enhances the parathyroid mediated increase of Ca reabsorption.