a
Nitrogen
b
Hydrogen
c
Oxygen
d
Fluorine
Explanation
Correct Option
cVideo Explanation
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Discussions (4)

Hydrocarbon1
5 years ago
yes oxygen is correct...
helps in formation of water and sand that is H₂O and SiO₂
Nitrogen
Hydrogen
Oxygen
Fluorine

yes oxygen is correct...
helps in formation of water and sand that is H₂O and SiO₂