Which of the following occurs when an aqueous solution of sodium hydroxide is electrolysed using graphite electrodes?

Which of the following occurs when an aqueous solution of sodium hydroxide is electrolysed using graphite electrodes?
A Sodium metal is produced at the anode
B Sodium amalgam is formed at the cathode
C Oxygen gas is produced at the anode
D The grahite anode dissolves

Answer is C

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