A. Oxygen and Hydrogen
B. Hydrogen and Sulfur
C. Carbon and Silicon
D. Hydrogen and Helium
Submitted by: Mansoor Ul Haque
Correct Answer: Hydrogen and Helium ✔
Last Updated: April 09, 2018
A. Oxygen and Hydrogen
B. Hydrogen and Sulfur
C. Carbon and Silicon
D. Hydrogen and Helium
Submitted by: Mansoor Ul Haque
Correct Answer: Hydrogen and Helium ✔
Last Updated: April 09, 2018