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
Least propensity for lymphatic spread would be 
Select and explain. 
A. Basal cell cancer, B. Squomous cell cancer, C. Malignant melanoma, D. Merkel cell cancer
A: Basal cell cancer
Answer: A: Basal cell cancer 
Explanation: Lymphatic spread & metastasis is extremely rare in Basal cell cancer.