A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Halogen
Submitted by: Iram Saleem
Correct Answer: Carbon dioxide ✔
Last Updated: April 09, 2018
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Halogen
Submitted by: Iram Saleem
Correct Answer: Carbon dioxide ✔
Last Updated: April 09, 2018