The nuclei of which one of the following pairs of nuclei are isotons ?

Options

A. `""_(34)Se^(74), ""_(31)Ca^(71)`
B. `""_(42)Mo^(92), ""_(40)Zr^(92)`
C. `""_(38)Sr^(81), ""_(38)Sr^(86)`
D. `""_(20)Ca^(40), ""_(16)S^(32)`

Answer

A

Explanation

Nuclei having same neutrons, called isotones.