If $a$ and $b$ are two non-collinear vectors and $xa + yb = 0$,then:

  • A
    $x = 0$,but $y$ is not necessarily zero
  • B
    $y = 0$,but $x$ is not necessarily zero
  • C
    $x = 0$ and $y = 0$
  • D
    None of these

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