The density of 'x' M solution ('X' molar) of NaOH is $$1.12 \text{ g mL}^{-1}$$, while in molality, the concentration of the solution is $$3 \text{ m (3 molal)}$$. Then $$x$$ is (Given : Molar mass of NaOH is $$40 \text{ g/mol}$$)

A

3.5

B

3.8

C

2.8

D

3.0