यदि $\lim _{x \rightarrow 0}\left\{1+x \log \left(1+a^2\right)\right\}^{1 / x}=2 a \sin ^2 \theta$,जहाँ $a>0$ और $\theta \in R$,तो:

  • A
    $\theta=n \pi \pm \frac{\pi}{2}, (n \in Z)$
  • B
    $\theta=2 n \pi \pm \frac{\pi}{2}, (n \in Z)$
  • C
    $\theta=n \pi+\frac{\pi}{2}, (n \in Z)$
  • D
    $\theta=n \pi \pm \frac{\pi}{4}, (n \in Z)$

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