Mason\textquotesingle s weight is an even number = 48kg / 52kg.  Joshua\textquotesingle s weight is a multiple of 5 = 45kg.  Christopher is not the heaviest = x 53kg.  Mateo is not the lightest = x 45kg  Jason - \textgreater{} either Mason or Christpoher is 28/52kg -\textgreater{} Mateo. 
The weights of four boys are $45\rm{kg}$, $48\rm{kg}$, $52\rm{kg}$ and $53\rm{kg}$. Mason\textquotesingle s weight is an even number. Joshua\textquotesingle s weight is a multiple of $5$. Christopher is not the heaviest and Mateo is not the lightest. Who is the heaviest among the four boys? 

(A) Mason 
(B) Joshua 
(C) Christopher 
(D) Mateo 
(E) Impossible to determine 