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: Pathology
Benign tumor which shows metastasis 
Select and explain. 
A. Warthin's tumor, B. Ameloblastorna, C. Keratocanthoma, D. Neurofibrorna
B: Ameloblastorna
Answer: B: Ameloblastorna 
Explanation: None