Let $$f(x) = 2\cos^{-1}x + 4\cot^{-1}x - 3x^2 - 2x + 10, x \in [-1, 1]$$. If $$[a, b]$$ is the range of the function, then $$4a - b$$ is equal to

A

$$11$$

B

$$11 - \pi$$

C

$$11 + \pi$$

D

$$15 - \pi$$