If the relation between time of decay (t) and half life period `(t_(1//2))` is `(t = 4 t_(1//2))`, the relation between r and mean life (T) is:

If the relation between time of decay (t) and half life period `(t_(1//2))` is `(t = 4 t_(1//2))`, the relation between r and mean life (T) is:
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If the relation between time of decay (t) and half life period `(t_(1//2))` is `(t = 4 t_(1//2))`, the ... `27^(4)` In 2 C. 4 T In 2 D. 2T In 2
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