<prompt> Lichenisation occurs in which layer of skin-Stratum malpighiStratum corneumStratum hucidumStratum granulosum  <response>: The Malpighian layer of the skin is generally defined as both the stratum basale and stratum spinosum as a unit, although it is occasionally defined as the stratum basale specifically,or the stratum spinosum specifically.It is named after Marcello Malpighi 