Write nuclear equation for $\beta^{-}$ decay of $_{83} Bi ^{210}$ $\beta^{-}$ decay of $_{83} Bi ^{210}$

Question

$\begin{array}{1 1} _{83}Bi^{210} \to {84}X^{210} +e^{-}+\bar{\gamma} \\ _{83}Bi^{210} \to {84}X^{210} +e^{-}+\bar{\gamma} \\ _{83}Bi^{210} \to {84}X^{210} +e^{+}+\gamma \\ _{83}Bi^{210} \to {84}X^{210}+e^{-}+\gamma \end{array} $