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
The most malignant form of malignant melanoma is ? 
Select and explain. 
A. Nodular, B. Hutchinson's melanotic freckle, C. Acral lentiginous type, D. Superficial spreading
A: Nodular
Answer: A: Nodular 
Explanation: Ans. is 'a' i.e. Nodular Schwaz 9/e p415 writes that- "In general, there is no significant difference between different histologic tumor types in terms of prognosis, when matched for tumor thickness, gender, age, or other. Nodular melanomas have the same prognosis as superficial spreading types when lesions are matched for depth of invasion. Lentigo maligna types, however, have a better prognosis even after correcting for thickness, and acral lentiginous lesions have a worse prognosis."