# Check whether the relation R defined in the set ${1, 2, 3, 4, 5, 6}$ as $R= {(a,b) : b= a+1}$ is reflexive, symmetric or transitive.
$\begin{array}{1 1} \text{Reflexive, Symmetric and Transitive} \\ \text{Not Reflexive, Only Symmetric and Transitive} \\ \text{Only Transitive} \\ \text{Not Reflexive, Not Symmetric and Not Transitive}\end{array}$