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
[{'content': 'Which of the following statements is true regarding hemangioma of the bone -a) Occurs common in skull bonesb) Requires observation as it is premalignantc) Hamartomous in origind) Forms 10-12% of the bone tumorse) Local gigantism occurs when it occurs in an extremity \nSelect and explain. \nA. acd, B. bde, C. ace, D. ade', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]