If $$\alpha$$ denotes multiplication, $$\beta$$ denotes division, $$\gamma$$ denotes addition and $$\delta$$ denotes subtraction, then, 

$$6 \delta \left[\left\{(6 \gamma 4)\beta 8\right\}\alpha 2\right] =$$

A

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

B

$$3 \frac{1}{2}$$

C

3

D

2