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
A 50-years old woman complains of intermittent bleeding from the left nipple over the past 3 months. No mass is palpable; but a bead of blood can be expressed from the nipple. The ideal procedure in this case would be- 
Select and explain. 
A. Cytological examination of discharge and if no malignant cells, to be kept under careful observation, B. Segmental excision of breast, C. Microdochotomy, D. Simple mastectomy
C: Microdochotomy
Answer: C: Microdochotomy 
Explanation: None