# The half-lives of two radioactive nuclides A and B are taken separately and allowed to disintegrate for 4 min. What will be the ratio of weights of A and B disintegrated?

$\begin {array} {1 1} (a)\;1:1 & \quad (b)\;5:4 \\ (c)\;1:2 & \quad (d)\;1:3 \end {array}$