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: Social & Preventive Medicine
Lung cancer is an industrial hazard in/for – 
Select and explain. 
A. Chimney sweepers, B. Aniline industry, C. Gas industry, D. Benzol industry
C: Gas industry
Answer: C: Gas industry 
Explanation: None