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
Ca breast Stage T4b involves all except: 
Select and explain. 
A. Nipple retraction, B. Skin ulcer over the swelling, C. Dermal edema, D. Satellite nodule
A: Nipple retraction
Answer: A: Nipple retraction 
Explanation: None