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
True about pagets disease of the nipple is- 
Select and explain. 
A. Always there is underlying carcinoma, B. Often bilateral eczema of nipple seen, C. Histology reveals giant cells, D. Highly malignant
A: Always there is underlying carcinoma
Answer: A: Always there is underlying carcinoma 
Explanation: None