Which of following is correct statement?

Question

Electrolytic decomposition of NaCl in liquid state in formation of Na at cathode and anode

Electrolytic decomposition of NaCl in formation of Na at cathode and $Cl_2$at anode

Electrolysis of $AgNO_3(aq)$ results in Ag deposited at cathode

Electrolysis of conc.NaCl results in $O_2$ at anode and $H_2$at cathode