પૂર્ણાંક $n$ જેના માટે $\mathop {\lim }\limits_{x \to 0} \,\frac{(\cos x - 1)(\cos x - e^x)}{x^n}$ એ શૂન્યતર વાસ્તવિક સંખ્યા મળે,તે $n$ ની કિંમત શોધો.

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

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