In the transformation of ${}_{92} U^{ 238} \mathrm{to}{}_{ 92} U^{ 234}$ involves one emission is $\mathrm{\alpha }$-particle, what should be the other emission(s)?

• A

  $\text{ Two }{\mathrm{\beta }}^{-}$

• B

  $\text{ Two }{\mathrm{\beta }}^{-}\text{and one }{\mathrm{\beta }}^{+}$

• C

  $\text{ One }{\mathrm{\beta }}^{-}\text{and one }\mathrm{\gamma }$

• D

  $\text{ One }{\mathrm{\beta }}^{+}\text{and one }{\mathrm{\beta }}^{-}$