This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Skin
Parakeratosis is defined as? 
Select and explain. 
A. Retained nuclei in stratum corneal cells, B. Elongation of rete ridges, C. Increased number of cells in stratum spinosum, D. Increased thickness of corneal layer
A: Retained nuclei in stratum corneal cells
Answer: A: Retained nuclei in stratum corneal cells 
Explanation: ANSWER: (A) Retained nuclei in stratum corneal cellsREF: IADVL text book of dermatology 3rd e p. 91Some terminology related to dermatohistopathologyHyperkeratosisThickening of startum comeumHypergranulosisThickening of stratum granulosumParakeratosisRetention of nuclei in stratum comeumPapillomatosisPapillary dermal hyperplasiaSpongiosisIntercellular edema in stratum soinosumAcanthosisThickening of Spinous layerAcantholysisSeparation of keratinocytes after application of pressure