Which of the following are the reasons/factors for exposure to benzene pollution? 1. Automobile exhaust 2. Tobacco smoke 3. Wood burning 4. Using varnished wooden furniture 5. Using products made of polyurethane Select the correct answer using the code given below:
Explanation
Benzene is released when fuels and organic matter burn. Petrol vehicle exhaust is a major outdoor source, tobacco smoke is the largest personal source for smokers, and burning wood or other biomass also emits it. Varnished furniture and polyurethane products are better known for releasing formaldehyde and other volatile organic compounds, and once cured they are not counted as significant benzene sources. So 1, 2 and 3 only.