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
Surgery for periductal mastitis - 
Select and explain. 
A. Hadfield's operation, B. Patey's mastectomy, C. Modified radical mastectomy, D. None of the above
A: Hadfield's operation
Answer: A: Hadfield's operation 
Explanation: None