2020 Environment - Pollution

Which of the following are the reasons/factors for exposure to benzene pollution?1. Automobile exhaust2. Tobacco smoke3. Wood burning4. Using varnished wooden furniture5. Using products made of polyurethaneSelect the correct answer using the code given below:

• 1, 2 and 3 only
• 2 and 4 only
• 1, 3 and 4 only
• 1, 2, 3, 4 and 5