Among `Na,Hg,S,Pt` and graphite which can be used as electodes in electrolytic cell having aqueous solutions?

Among Na,Hg ,S,Pt and graphite which can be used as electrodes in electrolytic cells having aqueous solutions:

Among Na, Hg, S ,Pt and graphite which can be used as electrodes in electrolytes cells having aqueous solutions ?

Among Na, Hg, S, Pt and graphite, which can be used as electrodes in electrolystic cells having aqueous solutions?

Which of the substances Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution ?

Which of the substances Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution? Na, Pt and graphite Hg, pt and graphite Pt and graphite only Na and S only

Which of the following is a weak electrolyte in aqueous solution?