This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolic Disorders of Bone, Subject name: Orthopaedics
Drug of choice for bisphosphonate resistant osteoporosis : 
Select and explain. 
A. Teriparatide, B. Denosumab, C. Anakinra, D. Calcitonin
A: Teriparatide
Answer: A: Teriparatide 
Explanation: Drug of choice for both senile and postmenopausal osteoporosis are Bisphosphonates. However, where osteoporosis is Resistant to bisphosphonates, Teriparatide has shown good results.