This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Newer inclusion in 2015 WHO classification of squamous cell carcinoma of lung include(s) 
Select and explain. 
A. Clear cell variant, B. Papillary cell variant, C. Adenocarcinoma variant, D. Nonkeratinizing variant
D: Nonkeratinizing variant
Answer: D: Nonkeratinizing variant 
Explanation: Answer- D, Nonkeratinizing variantOld classification-PapillaryClear cellSmall cellBasaloidNewer Classification-Keratinizing SCCNonkeratinizing SCCBasaloid SCCPreinvasive: SCC in situ