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': 'Undifferentiated carcinoma of nasopharynx belongs to which category as per WHO classification \nSelect and explain. \nA. Type 1, B. Type 2, C. Type 3, D. Type 4', 'role': 'user'}, {'content': 'Answer: C \nExplanation: NASOPHARYNGEAL CANCER On the basis of histology, as seen on light microscopy, WHO has lately reclassified epithelial growths into three types:- Ref:- Dhingra; pg num:-250', 'role': 'assistant'}]