List-I gives the direction of non-zero velocity vectors of the two particles $A$ and $B$ . List-II gives the possible directions of vectors of relative velocity. (Relative velocity of $A$ with respect to $B$ is defined as $V_{A} - V_{B}$ )

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(I) V B / A ​ = V B ​ − V A ​ V B / A ​ = V B ​ i ^ − ( V A ​ cos 3 0 ∘ i ^ + V A ​ sin 3 0 ∘ j ^ ​ ) I → P , Q , R ​ (II) V A / B ​ = V A ​ − V B ​ Up-right ,Vertical up II → S , T ​ (III) V B / A ​ = V B ​ − V A ​ III → P ​ (IV) V A / B ​ = V A ​ − V B ​ I V → Q ​ Answer: A

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