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
[{'content': 'True regarding haemangioma of the spleen: March 2005 \nSelect and explain. \nA. Least common benign tumour of the spleen, B. May transforms into a haemangiosarcoma, C. Malignant transformation may be managed conservatively, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: May transforms into a haemangiosarcoma Haemangioma of the spleen is the most common benign tumour of the spleen and may develop into a haemangiosarcoma', 'role': 'assistant'}]