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: Dental
Which of the following melanoma carries the worst prognosis? 
Select and explain. 
A. Lentigo Maligna, B. Lentigo Maligna melanoma, C. Superficial spreading type, D. Nodular Melanoma
D: Nodular Melanoma
Answer: D: Nodular Melanoma 
Explanation: Nodular Melanoma characterized by verticle or down growth of melanoma cells, and carries the worst prognosis.