In his wardrobe, Timothy has 3 trousers. One of them is black, the second blue, and the third brown. In his wardrobe, he also has 4 shirts. One of them is black and the other 3 are white. He opens his wardrobe in the dark and picks out one shirt-trouser pair, without examining the colour. What is the likelihood that neither the shirt nor the trouser is black?

A

$$\frac{1}{12}$$

B

$$\frac{1}{6}$$

C

$$\frac{1}{4}$$

D

$$\frac{1}{2}$$