Question
In a neutron-induced fission reaction of ${}^{239}\textrm{Pu}$, which of the following is produced along with ${}^{96}\textrm{Sr}$ and four neutrons?
1. ${}^{139}_{56}\textrm{Ba}$
2. ${}^{140}_{56}\textrm{Ba}$
3. ${}^{139}_{54}\textrm{Xe}$
4. ${}^{140}_{54}\textrm{Xe}$