Which statement is true for solution of $0.020{\mathrm{MH}}_2{\mathrm{SO}}_4$

2 litre of the solution contains 0.020 mole of ${\mathrm{SO}}_4^{2-}$

I litre of the solution contains 0.020 mole ${\mathrm{H}}_3{\mathrm{O}}^{+}$

2 litre of the solution contains 0.080 mole of  ${\mathrm{H}}_3{\mathrm{O}}^{+}$

None of these