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
Strontium ranelate is approved for treatment of: 
Select and explain. 
A. Asthma, B. Cystic fibrosis, C. UTI, D. Osteoporosis
D: Osteoporosis
Answer: D: Osteoporosis 
Explanation: Strontium ranelate is approved in several European countries for the treatment of osteoporosis. It increases bone mass throughout the skeleton; in clinical trials, the drug reduced the risk of veebral fractures by 37% and nonveebral fractures by 14%. It appears to be modestly antiresorptive, while at the same time not causing as much of a decrease in bone formation (measured biochemically). Ref: Harrison's principle of internal medicine 17th edition, chapter 338.