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: Dental
Acanthosis involves – 
Select and explain. 
A. Str spinosum, B. Str granuolosum, C. Str Basale, D. Str corneum
A: Str spinosum
Answer: A: Str spinosum 
Explanation: Acanthosis

This term is used to describe an increase in a number of cells in the spinous cell layer or prickle cell layer of the epidermis.