The correct relation between `t_(av)`=average life and `t_(1//2)=` half life for a radioactive nuclei.

Options

A. `t_(av)=t_(1//2)`
B. `t_(av)=(1)/(2)t_(1//2)`
C. `0.693t_(av)=t_(1//2)`
D. `t_(av)=0.693t_(1//2)`