In which of the following pairs, the ions are isoelectronic? Na^(+), Mg^(2+)""(ii) Al^(3+), O^(-) (iii)Na^(+), O^(2-) ""N^(3-), Cl^(-)

In which of the following pairs, the ions are isoelectronic? Na^(+), M

1.	In which of the following pairs, the ions are isoelectronic? Na^(+), Mg^(2+)""(ii) Al^(3+), O^(-) (iii)Na^(+), O^(2-) ""N^(3-), Cl^(-)
Answer» Only (i) Both (i) & (III) Both (iii) & (IV) Only (ii) ANSWER :B