This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'True about malignant melanoma \nSelect and explain. \nA. Lymphatic spread, B. Lymph node biopsy is done always, C. Block dissection to be done when sentinel node is involved, D. Microsatellitism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: No answer All the 4 options are true', 'role': 'assistant'}]