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
Nasopharyngeal carcinoma seen in which occupation? 
Select and explain. 
A. Asbestos industry, B. Cement industry, C. Wood workers, D. Chimney workers
C: Wood workers
Answer: C: Wood workers 
Explanation: Ans. is 'c' i.e., Wood workersRef Dhingra 4h/e p. 235; Nasopharyngeal carcinoma By Andrew Van Hasselt,Alan G. Gibb 2d/e p. 4Wood dusts exposure is a risk factor of nasopharyngeal carcinoma andAdenocarcinoma of PNS.Formaldehyde exposure is a risk factor of Nasopharyngeal carcinoma.