. Two radioactive nuclei P and Q in a given sample decay
into a stable nucleous R . At time t = 0 , number of P species are 4 N0 and that of Q are N0 .
Half - life of P (for conversion to R ) is 1 minute where as that of Q is 2 minutes. Initially there are no nuclei of R present in the sample.
When number of nuclei of P and Q are equal, the number of nuclei of R present in the sample would be
Hence, Option B is correct.