The approximate median of the Poissondistribution with parameter $$\lambda$$ is:

A

$$\lambda + \frac{1}{3} + \frac{1}{50 \lambda}$$

B

$$\sqrt{\lambda + \frac{1}{3} - \frac{1}{50 \lambda}}$$

C

$$\lambda + \frac{1}{3} - \frac{1}{50 \lambda}$$

D

$$\lambda + \frac{1}{3} + \sqrt{\frac{1}{50 \lambda}}$$