Write down all the subsets of the following sets $\{1,2,3\}$

Question

$\begin{array}{1 1}(A)\;\{\phi\},\{1\},\{2\}\\(B)\;\{\phi\},\{1\},\{2\},\{3\}\\(C)\;\{\phi\},\{1\},\{2\},\{3\},\{1,2\},\{1,3\},\{2,3\}\\(D)\;\{\phi\},\{1\},\{2\},\{3\},\{1,2\},\{1,3\},\{2,3\},\{1,2,3\}\end{array} $