Which of the following is correct?
I. Sodium (Na) is present as metal in nature.
II. $$\text{Na}_2\text{O}_2$$ is paramagnetic.
III. $$\text{NaO}_2$$ is paramagnetic.
IV. Na reacts with $$\text{N}_2$$ to form $$\text{Na}_3\text{N}$$.

A

III only

B

II and IV

C

I, III and IV

D

II, III and IV