This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oncology, Subject name: Medicine
[{'content': 'True about malignant melanoma- \nSelect and explain. \nA. Lymphatic spread, B. Lymph node biopsy is always done, C. Biopsy to be done when sentinel node is involved, D. Microsatellitism seen', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The main cause of death in melanoma patients is widespread metastases. Metastases develop in regional lymph nodes, as satellite or in-transit lesions, or in distant organs. Lymph flow and chemotaxis is responsible for the homing of melanoma cells to different sites Ref Harrison 20th edition pg 556', 'role': 'assistant'}]