Which statement is correct about how aluminium is prepared and about its properties?
- AAluminium is obtained by heating aluminium oxide with carbon.
- BAluminium is produced at the anode by electrolysis of aluminium oxide dissolved in molten cryolite.
- CAluminium is unreactive as it forms an oxide coating.
- DAluminium is used in overhead electricity cables as it is a good conductor of electricity and has a high density.