यदि $x = \log_{2a} a$,$y = \log_{3a} 2a$ और $z = \log_{4a} 3a$ है,तो $yz(2-x)$ का मान ज्ञात कीजिए।

  • A
    $1$
  • B
    $-1$
  • C
    $2$
  • D
    $-2$

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