यदि $\lim _{x \rightarrow 0}(2-\cos x \sqrt{\cos 2 x})^{\left(\frac{x+2}{x^{2}}\right)}$ का मान $e^{a}$ के बराबर है,तो $a$ का मान $.....$ है।

  • A
    $1$
  • B
    $2$
  • C
    $3$
  • D
    $4$

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