$\tan 5^{\circ} \tan 25^{\circ} \tan 45^{\circ} \tan 65^{\circ} \tan 85^{\circ} = $

  • A
    $-1$
  • B
    $1$
  • C
    $\frac{1}{2}$
  • D
    આમાંથી કોઈ નહીં

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