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
[{'content': 'Level 1 axillary lymph node are present: \nSelect and explain. \nA. Lateral to pectoralis minor, B. Medial to pectoralis minor, C. Lateral to pectoralis major, D. Medial to pectoralis major', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Levels of Axillary lymph nodes are important to study and understand the metastasis of breast cancer.', 'role': 'assistant'}]