Which one of the following relations on $R$ is an equivalence relation
Which one of the following relations on $R$ is an equivalence relation
- A
$a\,{R_1}\,b \Leftrightarrow |a| = |b|$
- B
$a{R_2}b \Leftrightarrow a \ge b$
- C
$a{R_3}b \Leftrightarrow a \ {\rm{ divides }}\ b$
- D
$a{R_4}b \Leftrightarrow a < b$
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