This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb bones and muscles (proximal region) & Scapular movements, Subject name: Anatomy
Rotter's nodes are located between: 
Select and explain. 
A. Serratus anterior and trapezius, B. Latissimus dorsi and serratus anterior, C. Pectoralis major and pectoralis minor, D. Deltoid and pectoralis major
C: Pectoralis major and pectoralis minor
Answer: C: Pectoralis major and pectoralis minor 
Explanation: Rotter's nodes are located between Pectoralis major and pectoralis minor. Pectoralis minor divides the lymph node drainage as follows: LevelI: below the lower edge of the pectoralis minor muscle. Level II: underneath/posterior the pectoralis minor muscle. Level III: above/medial the pectoralis minor muscle. During mammary gland surgery, if we want to preserve pectoralis major, rotter's nodes should be preserved, Anterior pectoral lymph nodes, posterior subscapular lymph nodes both drain into central lymph nodes lateral to pectoralis minor.