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: Dental
[{'content': 'Least propensity for lymphatic spread would be \nSelect and explain. \nA. Basal cell cancer, B. Squomous cell cancer, C. Malignant melanoma, D. Merkel cell cancer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lymphatic spread & metastasis is extremely rare in Basal cell cancer.', 'role': 'assistant'}]