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: Orthopaedics
True about paget's disease -a) Common in young girl 10-16 yr of ageb) ↑ALPc) Associated with hypercalcemia & hypophosphatemiad) More common in femalee) Associated with chondrosarcoma 
Select and explain. 
A. ab, B. ad, C. be, D. ce
C: be
Answer: C: be 
Explanation: Paget's disease occurs after 40 years of age and is more common in males.
Alkaline phosphatase (ALP) is raised and calcium & phosphate are normal.
The usual malignancy complicating Paget's disease is osteosarcoma. There are some reports of cases of chondrosarcoma as a complication of Paget's disease.