If the system of linear equations $x + 2ay + az = 0$ $x + 3by + bz = 0$ $x + 4cy + cz = 0$ has a non-zero solution, then $a, b, c$

  • A

    are in $G..P.$

  • B

    are in $H.P.$

  • C

    satisfy $a + 2b + 3c = 0$

  • D

    are in $A.P.$

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