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
Nipple inversion occurs due to involvement of? 
Select and explain. 
A. Cooper's ligament, B. Subareolar duct, C. Parenchyma of breast, D. Subdermal lymphatics
B: Subareolar duct
Answer: B: Subareolar duct 
Explanation: Answer- B. Subareolar ductInversion ofnipple is due to fibrosis in and around subareolar duct.