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: Unknown
Adenocarcinoma of ethmoid sinus associated with 
Select and explain. 
A. Woodworkers, B. Nickel workers, C. Coal workers, D. Chimney workers
A: Woodworkers
Answer: A: Woodworkers 
Explanation: Ans. is 'a' i.e Woodworkers Workers of wood industry develop - Adenocarcinomas of ethmoid & other nasal sinusesWorkers of Nickle refining industry - Sq. cell Ca & anaplastic Ca of nasal sinuses.