This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neoplasia, Subject name: Surgery
[{'content': 'Most severe form of malignant melanoma is: \nSelect and explain. \nA. Superficially spreading, B. Nodular infiltrating type, C. Those arising in lower limb, D. Those in choroids', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: b (Nodular infiltrating type)Ref: Bailey & Love, 23rd ed, p. 183 & S. Das Surgery 3rd ed, p. 112', 'role': 'assistant'}]