<prompt> Acanthosis nigricans can occur due to -Increased multiplication of basal cellsCornification of basal cellsKeratinisation of epidermal cellsAll  <response>: Hyperplasia of stratum spinosum of the epidermis.Hyperkeratosis Thickening of Stratum corneum of epidermis Cornification of epidermis.Slight basal cell hyperpigmentation. 