Arrange the following in the increasing order of their metallic character Na, C, O, Li, Be

A

$$\mathrm{C} < \mathrm{O} < \mathrm{Na} < \mathrm{Li} < \mathrm{Be}$$

B

$$\mathrm{O} < \mathrm{C} < \mathrm{Be} < \mathrm{Na} < \mathrm{Li}$$

C

$$\mathrm{O} < \mathrm{C} < \mathrm{Be} < \mathrm{Li} < \mathrm{Na}$$

D

$$\mathrm{C} < \mathrm{O} < \mathrm{Be} < \mathrm{Li} < \mathrm{Na}$$