This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharynx, Subject name: ENT
[{'content': 'Keratinizing squamous cell carcinoma of nasopharynx is \nSelect and explain. \nA. Type I, B. Type II, C. Type III, D. Type IV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: WHO classification based on histopathology Present WHO terminology Former terminology Type I (25% Keratinizing carcinoma Squamous cell carcinoma Type II (12%) Nonkeratinizing differentiated carcinoma * Transitional cell carcinoma * Intermediate cell carcinoma * Lymphoepithelial carcinoma Type III (63%) Nonkeratinizing undifferentiated carcinoma * Anaplastic carcinoma * Clear cell carcinoma * Lymphoepithelial carcinoma (Schminke type is tumour with diffusely distributed malignant tissue) * Spindle cell carcinoma (Ref: Diseases of Ear, Nose and Throat, P.L Dhingra, 7th edition, page 283)', 'role': 'assistant'}]