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: Unknown
Marker for malignant melanoma is- 
Select and explain. 
A. Cytokeratin, B. MBN-45, C. Alpha FP, D. S 100
D: S 100
Answer: D: S 100 
Explanation: S 100