Which of the following statements regarding sulphur is incorrect?

At $600^{\circ} \mathrm{C}$ the gas mainly consists of $\mathrm{S}_{2}$ molceules

The oxidation state of sulphur is never less than $+4$ in its compounds

$\mathrm{S}_{2}$ molecule is paramagnetic

The vapour at $200^{\circ} \mathrm{C}$ consists mostly of $\mathrm{S}_{8}$ rings