A) \[a\,{{R}_{1}}\,b\Leftrightarrow |a|=|b|\]
B) \[a{{R}_{2}}b\Leftrightarrow a\ge b\]
C) \[a{{R}_{3}}b\Leftrightarrow a\text{ divides }b\]
D) \[a{{R}_{4}}b\Leftrightarrow a<b\]
Correct Answer: A
Solution :
It is obvious.
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