$^{239}_{94}\text{Pu}$ is one isotope of plutonium. A nucleus of this isotope can take in a neutron and then undergo fission to produce two different nuclei. The two nuclei formed are gold, $^{207}_{79}\text{Au}$, and phosphorus, $^{31}_{15}\text{P}$. Neutrons are also emitted in this reaction. How many neutrons are produced when the nucleus splits?
- A1
- B2
- C4
- D5