In $$MLT \theta$$ system, the dimension of thermal conductivity is

A

$$ML^{-1}T^{-1} \theta^{-3}$$

B

$$MLT^{-1} \theta^{-1}$$

C

$$MLT^{-3} \theta^{-1}$$

D

$$MLT^{-2} \theta^{-1}$$