The relative velocity \( v_{B A} \) or \( v_{A B} \) is zero for two particles moving along \( X...

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The relative velocity \( v_{B A} \) or \( v_{A B} \) is zero for two particles moving along \( X \)-axis uniformly. The position-time graph for this situation will be
(a) straight lines parallel but inclined to time axis
(b) straight lines parallel and also parallel to time axis
(c) straight lines intersecting each other at some point
(d) curves and not straight lines
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