Let $R =\{( P , Q ) \mid P$ and $Q$ are at the same distance from the origin $\}$ be a relation, then the equivalence class of $(1,-1)$ is the set
Let $R =\{( P , Q ) \mid P$ and $Q$ are at the same distance from the origin $\}$ be a relation, then the equivalence class of $(1,-1)$ is the set
- [JEE MAIN 2021]
- A
$S =\left\{( x , y ) \mid x ^{2}+ y ^{2}=4\right\}$
- B
$S =\left\{( x , y ) \mid x ^{2}+ y ^{2}=1\right\}$
- C
$S =\left\{( x , y ) \mid x ^{2}+ y ^{2}=\sqrt{2}\right\}$
- D
$S=\left\{(x, y) \mid x^{2}+y^{2}=2\right\}$
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