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
The most common malignancy found in Marjolin's ulcer is 
Select and explain. 
A. Basal cell carcinoma, B. Squamous sell carcinoma, C. Malignant fibrous histiocytoma, D. Neurotrophic malignant melanoma
B: Squamous sell carcinoma
Answer: B: Squamous sell carcinoma 
Explanation: Repeated question