Which of the following statement about the isolation of alkali metals is true ?

Options

A. Na and K metals can be isolated by the reduction of their oxides
B. Na and K metals can be prepared from their aqueous salt solutions by metal displacement method
C. Na and K metals can be prepared by the electrolysis of their aqueous salt solutions
D. Na and K metals can be prepared by the electrolysis of their fused chlorides.

Answer

D