$[x]$ महत्तम पूर्णांक फलन को दर्शाता है। $x = -1$ पर,$\frac{d}{dx} \sin(\pi[x])$ का मान क्या है?

  • A
    $0$
  • B
    $2$
  • C
    $-2$
  • D
    $1/2$

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