When $\frac{1}{a} + \frac{1}{c} + \frac{1}{a - b} + \frac{1}{c - b} = 0$ and $b \ne a \ne c$,then $a, b, c$ are

  • A
    in $H.P.$
  • B
    in $G.P.$
  • C
    in $A.P.$
  • D
    None of these

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