This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
Lymph node first involved in Ca breast is/are 
Select and explain. 
A. Axillary, B. Internal mammary, C. Supraclavicular, D. Contralateral axillary
A: Axillary
Answer: A: Axillary 
Explanation: .Levels of the axillary nodes *Level I : Below and lateral to the pectoralis minor muscle--anterior, lateral, posterior *Level II : Behind the pectoralis minor muscle--central *Level III : Above and medial to pectoralis minor muscle-- apical Note in carcinoma breast * Spread restricted to level I nodes carries better prognosis * Spread to level II has poor prognosis * Spread to level III indicates worst prognosis. ref:SRB&;s manual of surgery,ed 3,pg no 455