List of all the elements of the following set : D={x : x is a letter in the word "LOYAL"}

Question

$\begin{array}{1 1}(A)\;D=\{L,O,Y,A\}\\(B)\;D=\{L,O,A\}\\(C)\;D=\{O,L\}\\(D)\;\text{None of these}\end{array}$