The increasing order of he ionic radii of the given isoelectronic species is :

Question

( A ) $Cl^-, Ca^{2+}, K^+, S^{2-}$
( B ) $Ca^{2+}, K^+, Cl^-, S^{2-}$
( C ) $S^{2-}, Cl^-, Ca^{2+}, K^+$
( D ) $K^+, S^{2-}, Ca^{2+}, Cl^-$