Write the following sets in roster form : $B=\{x : x \text{ is a natural number less than 6 }\}$

Question

$\begin{array}{1 1}(A)\;B=\{-2,-1,0,1,2,3,4,5\}\\(B)\;B=\{1,2,3,4,5\}\\(C)\;B=\{3,4,5\}\\(D)\;B=\{4,5\}\end{array} $