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
rPTH used in osteoporosis is: 
Select and explain. 
A. Teriparatide, B. Denosumab, C. Calcitriol, D. Calcipotriol
A: Teriparatide
Answer: A: Teriparatide 
Explanation: None