In the iso-electronic series : K^(+),...

In the iso-electronic series :
`K^(+),Cl^(-),S^(2-),Ca^(2+)`, the largest size is of

A

`Ca^(2+)`

B

`K^(+)`

C

`Cl^(-)`

D

`S^(2-)`

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The correct Answer is:

D

in isoelectronic ion , more is the nuclear charge, smaller is the size

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