<prompt> Newer inclusion in 2015 WHO classification of squamous cell carcinoma of lung includesClear cell variantPapillary cell variantAdenocarcinoma variantNonkeratinizing variant  <response>: Answer- D, Nonkeratinizing variantOld classification-PapillaryClear cellSmall cellBasaloidNewer Classification-Keratinizing SCCNonkeratinizing SCCBasaloid SCCPreinvasive: SCC in situ 