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
Marjolin ulcer 
Select and explain. 
A. Ca in marjolin's is squamous cell ca, B. Chronic venous insufficiency, C. Basal cell carcinoma, D. arise from base of the ulcer
A: Ca in marjolin's is squamous cell ca
Answer: A: Ca in marjolin's is squamous cell ca 
Explanation: .marjolin&;s ulcer is the name given to a malignancy ( usually a squamous cell carcinoma ) which arise in any long standing wound or a scar mostly scar of an old burn it grows slowly as it is avascular it is painless