Two radioactive elements A and B initially have same number of atoms. The half life of A is same as the average life of B. If $$\lambda_A$$ and $$\lambda_B$$ are decay constants of A and B respectively, then choose the correct relation from the given options.

A

$$\lambda_A \ln 2 = \lambda_B$$

B

$$\lambda_A = \lambda_B$$

C

$$\lambda_A = \lambda_B \ln 2$$

D

$$\lambda_A = 2\lambda_B$$