Which one of the following configuration represents a noble gas 

• A

  $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^6 3{\mathrm{s}}^2$

• B

  $4\mathrm{s}$

• C

  $1{\mathrm{s}}^2 2{\mathrm{s}}^{2}2{\mathrm{p}}^6$

• D

  $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^6 3{\mathrm{s}}^{2}3{\mathrm{p}}^6 4{\mathrm{s}}^2$