1.

Let \[R=\left\{ \left( 1,3 \right),\left( 4,2 \right),\left( 2,4 \right),\left( 2,3 \right),\left( 3,1 \right) \right\}\] be a relation on the set \[A=\left\{ 1,2,3,4 \right\}.\]The relation R is

A. a function         
B. reflexive
C. not symmetric
D. transitive
Answer» D. transitive


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