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': 'Most severe form of malignant malenoma is - \nSelect and explain. \nA. Superficially spreading, B. Nodular infiltrating type, C. Those arising in lower limb, D. Those in choroid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]