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: ENT
[{'content': 'Non keratinized squamous cancer of nasopharynx belongs to which category? \nSelect and explain. \nA. Type 1, B. Type 2, C. Type 3, D. Type 4', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Types of Nasopharyngeal carcinoma Type 1: Differentiated keratinizing squamous cell CA. Type 2: Non keratinizing carcinoma Type 3: Undifferentiated carcinoma In endemic area M/C is undifferentiated carcinoma', 'role': 'assistant'}]