This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
The upper half of the esophagus in lined by 
Select and explain. 
A. Stratified cuboidal epithelium, B. Stratififed squamous epithelium, C. Stratififed squamous non keratinsed epithelium, D. Stratififed squamous keratinised epithelium
C: Stratififed squamous non keratinsed epithelium
Answer: C: Stratififed squamous non keratinsed epithelium 
Explanation: INDERBIR SINGH'S TEXTBOOK OF HUMAN HISTOLOGY-PAGE NO:263 The mucosa The mucous membrane of the oesophagus shows several longitudinal folds that disappears when the tube is distended The mucosa is lined by stratified squamous epithelium which is normally not keratinized