Which of the following statements regarding sulphur is incorrect?

1. A
   The vapour at $200^{\circ }\text{C}$ consists mostly of ${\text{S}}_8$ rings.
2. B
   At $600^{\circ }\text{C}$ the gas mainly consists of ${\text{S}}_2$ molecules.
3. C
   The oxidation state of sulphur is never less than $+4$ in its compounds.
4. D
   ${\text{S}}_2$ molecule is paramagnetic.