Which of the following correctly identifies the three particles emitted in the decay of the nucleus $_{{\text{20}}}^{{\text{45}}}{\text{Ca}}$ into a nucleus of $_{{\text{21}}}^{{\text{45}}}{\text{Sc}}$?

A.     $\alpha ,{\text{ }}{\beta ^ - },{\text{ }}\gamma$

B.     ${\beta ^ - },{\text{ }}\gamma {\text{, }}\bar \nu$

C.     $\alpha ,{\text{ }}\gamma {\text{, }}\bar \nu$

D.     $\alpha ,{\text{ }}{\beta ^ - }{\text{, }}\bar \nu$

B