Q: 2 (CDS-I/2012)

Which one among the following is a source of methane emission into the atmosphere ?
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 Q. Select the correct answer using the code given below : (a) 1, 2 and 3 only (b) 2 and 4 only (c) 1, 3 and 4 only (d) 1, 2, 3, 4 and 5
question_subject: 
Science
question_year: 
2012
question_exam: 
CDS-I
stats: 
0,1584,632,184,136,312,1584