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: Pathology
Paget's disease involves which of the following bone-a)  Pelvisb)  Vertebraec)  Skulld)  Phalangese)  Toes 
Select and explain. 
A. ab, B. abc, C. acd, D. bcd
B: abc
Answer: B: abc 
Explanation: Paget disease involves
Skull
Spine(vertebrae)
Tibia
Pelvis
Femur
Humerus