This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
All are malignant tumors except - 
Select and explain. 
A. Chloroma, B. Fibromatosis, C. Askins tumor, D. Liposarcoma
B: Fibromatosis
Answer: B: Fibromatosis 
Explanation: Fibromatosis are a group of fibroblastic proliferations having tendency to infiltrate. They are locally aggressive but do not metastasize. Basic Pathology, Robbins. Page no.: 793