List of all the elements of the following set : A={x : x is an odd natural number }

Question

$\begin{array}{1 1}(A)\;A=\{1,3,5,7....\}\\(B)\;A=\{5,7,9\}\\(C)\;A=\{2,4,6.....\}\\(D)\;A=\text{None of these}\end{array} $