Question9) Let $X$ be a set of three elements and $\mathcal{P}(X)$ be the power set of $X$. The digraph for one of the following relations on $\mathcal{P}(X)$ has no loops. A) $A \boldsymbol{R}_{\mathbf{1}} B$ iff $A=B$ B) $A \boldsymbol{R}_{\mathbf{2}} B$ iff $A \neq B$ C) $A \boldsymbol{R}_{\mathbf{3}} B$ iff $A \subseteq B$ D) $A \boldsymbol{R}_{\mathbf{4}} B$ iff $B \subseteq A$ E) NOTA