question_answer

Which of the given pairs of atoms contain(s) the same number of neutrons?

I.  \[_{\text{48}}^{\text{114}}\text{Cd}\] and \[_{50}^{\text{119}}\text{Sn}\]

II. \[_{\text{27}}^{\text{59}}\text{Co}\] and \[_{\text{28}}^{\text{59}}\text{Ni}\]

III.  \[_{\text{55}}^{\text{133}}\text{Cs}\] and \[_{\text{54}}^{\text{132}}\text{Xe}\]

IV. \[_{\text{29}}^{\text{63}}\text{Cu}\] and \[_{\text{29}}^{\text{65}}\text{Cu}\]

A) I and IV only   

B) I and III only

C)        III only 

D)        IV only