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 following except? 
Select and explain. 
A. Riedel's struma, B. Hyperophic scar, C. Sclerosing cholangitis, D. Panniculitis
B: Hyperophic scar
Answer: B: Hyperophic scar 
Explanation: Ans. is 'b' i.e., Hyperophic scar