Which one of the following does not belong to the set given in the box? \[\frac{\mathbf{3}}{\mathbf{6}}\mathbf{,}\frac{\mathbf{5}}{\mathbf{10}}\mathbf{,}\frac{\mathbf{9}}{\mathbf{18}}\]

• A.      \[\frac{42}{86}\]                   
• B.    \[\frac{13}{26}\]       
• C.  \[\frac{62}{124}\]                 
• D.    \[\frac{19}{38}\]