Two particles $A$ and $B$ are moving along a straight line with $B$ ahead of $A$. If their velocities remain constant,what will be the effect on the magnitude of their relative velocity when $A$ is ahead of $B$?

  • A
    It will increase.
  • B
    It will decrease.
  • C
    It will remain the same.
  • D
    It will become zero.

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