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: Skin
Actinic keratosis is seen in : 
Select and explain. 
A. Basal cell carcinoma, B. Squamous cell carcinoma, C. Malignant melanoma, D. Epithelial cell carcinoma
B: Squamous cell carcinoma
Answer: B: Squamous cell carcinoma 
Explanation: B i.e. Squamous Cell Carcinoma