C এর মান কোনটি হবে : ( _ 13 Al^ 27 stackrel One alpha -ray longrightarrow A stackrel One beta -ray longrightarrow B stackrel One beta -ray longrightarrow C )

{ }_{13} \mathrm{Al}^{27} \stackrel{\text { One } \alpha \text {-ray }}{\longrightarrow} \mathrm{A} \stackrel{\text { One } \beta \text {-ray }}{\longrightarrow} \mathrm{B} \stackrel{\text { One } \beta \text {-ray }}{\longrightarrow} \mathrm{C}

KUET 10-11