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: Medicine
True about Hypercalcemia -a) Rx of the primary causeb) Malignancy dose not produce hypercalcemiac) IV. fluid with Frusemide is givend) Amidronate is not effective 
Select and explain. 
A. a, B. bc, C. ad, D. ac
D: ac
Answer: D: ac 
Explanation: None