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
Localised idiopathic fibrosis is seen in all of the following except- 
Select and explain. 
A. Riedel's struma, B. Hypertrophic scar, C. Sclerosing cholangitis, D. Panniculitis
B: Hypertrophic scar
Answer: B: Hypertrophic scar 
Explanation: None