Which of these describes this four-pair relation R?

Explanation

1. 01

   It is reflexive, since every $(a, a)$ is in $R$.

2. 02

   It is not symmetric, since $(2, 3)$ is in $R$ but $(3, 2)$ is not, and transitive, since no pairs $(a, b), (b, c)$ in $R$ lack $(a, c)$.