$\mathop {\lim }\limits_{x \to 0} {(\cos ax)^{\csc^2 bx}}$ का मान है-

  • A
    $e^{\left( {\frac{{ - {a^2}}}{{2{b^2}}}} \right)}$
  • B
    $e^{\left( {\frac{{ - {b^2}}}{{2{a^2}}}} \right)}$
  • C
    $e^{\left( {\frac{{ - {a^2}}}{{{b^2}}}} \right)}$
  • D
    $e^{\left( {\frac{{ - {b^2}}}{{{a^2}}}} \right)}$

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