Select the option that is related to the third word in the same way as the second word is related to the first.
Sulphur : Sulphur dioxide :: Hydrogen : ?1
Ethane
2
Methane
3
Copper
4
Di-hydrogen Oxide
Select the option that is related to the third word in the same way as the second word is related to the first.
Sulphur : Sulphur dioxide :: Hydrogen : ?