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
The commonest type of ca breast is - 
Select and explain. 
A. Papillary ca, B. Pagets disease, C. Fibrasorcoma, D. Infiltrative ductal ca
D: Infiltrative ductal ca
Answer: D: Infiltrative ductal ca 
Explanation: None