• # question_answer If A, B and C are non-empty subsets of a set, then $\left( \mathbf{A}-\mathbf{B} \right)\cup \left( \mathbf{B}-\mathbf{A} \right)$ equal A)  $\left( A\cup B \right)-B$           B)  $A-\left( A\cap B \right)$ C)  $\left( A\cup B \right)-\left( A\cap B \right)$           D)  $\left( A\cap B \right)\cup \left( A\cup B \right)$

[c] $\because \left( A-B \right)\cup \left( B-A \right)$ [Which is symmetric difference] $=\left\{ A-A\cap B) \right\}\cup \left\{ B-\left( A\cap B \right) \right\}=\left( A\cup B \right)-\left( A\cap B \right)$