Plutonium-238 undergoes decay through the emission of an $\alpha$-particle. Which equation shows the decay of a plutonium-238 nucleus?
- A$^{{238}}_{{94}}\text{Pu} \rightarrow ^{{238}}_{{95}}\text{U} + ^{{0}}_{{-1}}\alpha$
- B$^{{238}}_{{94}}\text{Pu} \rightarrow ^{{234}}_{{92}}\text{U} + ^{{4}}_{{2}}\alpha$
- C$^{{238}}_{{94}}\text{Pu} \rightarrow ^{{234}}_{{92}}\text{U} + ^{{2}}_{{4}}\alpha$
- D$^{{238}}_{{94}}\text{Pu} \rightarrow ^{{242}}_{{96}}\text{U} + ^{{4}}_{{2}}\alpha$