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
[{'content': "Paget's disease involves which of the following bone-a)  Pelvisb)  Vertebraec)  Skulld)  Phalangese)  Toes \nSelect and explain. \nA. ab, B. abc, C. acd, D. bcd", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Paget disease involves\nSkull\nSpine(vertebrae)\nTibia\nPelvis\nFemur\nHumerus', 'role': 'assistant'}]