• # question_answer With reference to a universal set, the inclusion of a subset in another, is relation, which is [Karnataka CET 1995] A) Symmetric only B) Equivalence relation C) Reflexive only D) None of these

Since$A\subseteq A$. $\therefore$ Relation $'\subseteq '$ is reflexive. Since $A\subseteq B,\,\,$$B\subseteq C\Rightarrow A\subseteq C$ $\therefore$ Relation $'\subseteq '$ is transitive. But $A\subseteq B,\,\,$Þ$B\subseteq A$, $\therefore$ Relation is not symmetric.