question_answer

A nucleus \[_{n}{{X}^{m-4}}\] emits one \[\alpha \] and two \[\beta \] particles. The resulting nucleus will be :

A) \[_{n}{{X}^{m-4}}\]                                        

B) \[_{n-2}X{{m}^{-4}}\]

C) \[_{n-1}X{{m}^{-2}}\]                    

D)  none of these