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: Pathology
Diffuse epidermal hyperplasia is 
Select and explain. 
A. Hyperkeratosis, B. Parakeratosis, C. Acanthosis, D. Erosion
C: Acanthosis
Answer: C: Acanthosis 
Explanation: None