This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Histopathological findings, Subject name: Dental
Acanthosis involves:- 
Select and explain. 
A. Stratum malphigii, B. Stratum granulosum, C. Stratum lucidum, D. Stratum corneum
A: Stratum malphigii
Answer: A: Stratum malphigii 
Explanation: Acanthosis - Thickening of prickle cell layer or malphigian layer. Increase in number of keratinocytes in the prickle cell layer of the epidermis Pseudoacanthosis - increased thickness of the epidermis due to enlarged keratinocytes Acanthosis, Acantholysis- Stratum spinosumHypergranulosis, Agranulosis- Stratum Granulosum