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: Surgery
Intranasal calcitonin is given for a 65 year old post-menopausal lady. What is the likely indication? 
Select and explain. 
A. Paget's disease, B. Osteoporosis, C. Hypercalcemia, D. Osteopetrosis
B: Osteoporosis
Answer: B: Osteoporosis 
Explanation: Calcitonin-salmon is a hormone that decreases osteoclast activity, thereby impeding postmenopausal bone loss. It is indicated for the treatment of women who are more than 5 years post menopause and have low bone mass relative to healthy premenopausal women. It is available as an injection and as an intranasal spray. The intranasal spray is delivered as a single daily spray that provides 200 IU of the drug.