If the volume of parallelepiped formed by the vectors $$\hat{i} + \lambda\hat{j} + \hat{k}$$, $$\hat{j} + \lambda\hat{k}$$ and $$\lambda\hat{i} + \hat{k}$$ is minimum, then $$\lambda$$ is

A

$$-\frac{1}{\sqrt{3}}$$

B

$$-\sqrt{3}$$

C

$$\sqrt{3}$$

D

$$\frac{1}{\sqrt{3}}$$