यदि $\int_{0}^{a} \sqrt{\frac{a - x}{x}} dx = \frac{K}{2}$ है,तो $K = . . . . . .$.

  • A
    $\frac{\pi a}{2}$
  • B
    $\frac{5 \pi a}{2}$
  • C
    $\frac{3 \pi a}{2}$
  • D
    $\pi a$

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