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
TOC for postmenopausal osteoporosis is- 
Select and explain. 
A. Raloxifene, B. Tamoxifene, C. Estrogen, D. Alendronate
D: Alendronate
Answer: D: Alendronate 
Explanation: None