A. Carbondioxide gas
B. Hydrogen sulphide gas
C. Methane gas
D. Petrol vapours
Correct Answer: Methane gas ✔
Last Updated: August 25, 2020
A. Carbondioxide gas
B. Hydrogen sulphide gas
C. Methane gas
D. Petrol vapours
Correct Answer: Methane gas ✔
Last Updated: August 25, 2020