A radioactive material of half-life `T` was kept in a nuclear reactor at two different instants. The quantity kept second time was twice of the kept first time. If now their present activities are `A_1` and `A_2` respectively, then their age difference equals

Options

A. `(T )/( in 2) |in .(A_(1))/(A_(2))|`
B. `T |in.(A_(1))/(A_(2))|`
C. `(T)/(in 2) .|in.(A_(2))/(2A_(1))|`
D. `T|in.(A_(2))/(2A_(1))|`

Answer

C