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
Most severe form of malignant melanoma is: 
Select and explain. 
A. Superficially spreading, B. Nodular infiltrating type, C. Those arising in lower limb, D. Those in choroids
B: Nodular infiltrating type
Answer: B: Nodular infiltrating type 
Explanation: Ans: b (Nodular infiltrating type)Ref: Bailey & Love, 23rd ed, p. 183 & S. Das Surgery 3rd ed, p. 112