This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
Effect of Thiazides on calcium 
Select and explain. 
A. Increase excretion, B. Decrease excretion, C. Counterregulatory, D. None
B: Decrease excretion
Answer: B: Decrease excretion 
Explanation: Thiazides spare calcium by inhibiting their excretion.Ref: Goodman Gilman 12/e p 678