यदि $\sinh x = \frac{5}{12}$ है,तो $\cosh \frac{x}{2} =$

  • A
    $\frac{3}{2 \sqrt{5}}$
  • B
    $\frac{2}{3 \sqrt{3}}$
  • C
    $\frac{5}{\sqrt{6}}$
  • D
    $\frac{5}{2 \sqrt{6}}$

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