Elements having  ${\text{ns}}^{\text{2}}{\text{np}}^{\text{6}}$  valence shell electronic configuration lies in

${\text{'8}}^{\text{th }}\text{’group}\text{and}{\text{2}}^{\text{nd}}{\text{–6}}^{\text{th}}\text{ period}$

${\text{'18}}^{\text{th }}\text{’group}\text{and}{\text{2}}^{\text{nd}}{\text{–6}}^{\text{th}}\text{ period}$

${\text{'18}}^{\text{th }}\text{’group}\text{and}{1}^{\text{st}}{\text{–6}}^{\text{th}}\text{ period}$

$\text{'0 group}\text{and}{\text{I}}^{\text{st}}{\text{–7}}^{\text{th}}\text{ period}$