This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hospital waste and disaster management, Occupational health, 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 indusntry
C: Gas industry
Answer: C: Gas industry 
Explanation: Lung cancer is a hazard in gas industry, asbestos industry, nickel and chromium work, arsenic roasting plants. (REF. PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION, PAGE NO - 749)