If $x = cy + bz,\,\,y = az + cx,\,\,z = bx + ay$ (where $x, y, z $ are not all zero) have a solution other than $x = 0$, $y = 0$, $z = 0$ then $a, b$  and $ c $ are connected by the relation

  • [IIT 1978]
  • A

    ${a^2} + {b^2} + {c^2} + 3abc = 0$

  • B

    ${a^2} + {b^2} + {c^2} + 2abc = 0$

  • C

    ${a^2} + {b^2} + {c^2} + 2abc = 1$

  • D

    ${a^2} + {b^2} + {c^2} - bc - ca - ab = 1$

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  • [JEE MAIN 2021]

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