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
Apical group of lymph nodes belong to which level in the axillary group of nodes 
Select and explain. 
A. Level I, B. Level II, C. Level III, D. Supraclavicular
C: Level III
Answer: C: Level III 
Explanation: Apical group nodes are the infraclavicular group. There are three surgical levels of axillary lymph nodes:level I: below the lower edge of the pectoralis minor musclelevel II: underneath/posterior the pectoralis minor musclelevel III: above/medial the pectoralis minor muscle.level III are infraclavicular