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
This has increased risk of 
Select and explain. 
A. Squamous cell carcinoma, B. Basal cell carcinoma, C. Melanoma, D. Liposarcoma
A: Squamous cell carcinoma
Answer: A: Squamous cell carcinoma 
Explanation: This is a cutaneous horn. Actinic (solar) keratoses (AK), i.e. cutaneous horns and keratoacanthomas, were considered to be premalignant lesions leading to SCC. Ref: Bailey and Love, 27e, page: 606