Statement $A$: Helium and Beryllium have the same outer electronic configuration of the type $ns^2$.
Reason $R$: Both are chemically inert.

• A
  Statement $A$ and Reason $R$ are true,and Reason $R$ is the correct explanation of Statement $A$.
• B
  Statement $A$ and Reason $R$ are true,but Reason $R$ is not the correct explanation of Statement $A$.
• C
  Statement $A$ is true,but Reason $R$ is false.
• D
  Statement $A$ and Reason $R$ are both false.