A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Hydrogen sulphide
Submitted by: Rashid Mehmood
Correct Answer: Hydrogen sulphide ✔
Last Updated: January 02, 2020
A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Hydrogen sulphide
Submitted by: Rashid Mehmood
Correct Answer: Hydrogen sulphide ✔
Last Updated: January 02, 2020