MCQ

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$\int \frac{d x}{\sqrt{9 x-4 x^2}}=\ ........... $

• A
  $\frac{1}{9} \sin ^{-1}\left(\frac{9 x-8}{8}\right)+c$
• B
  $\frac{1}{2} \sin ^{-1}\left(\frac{8 x-9}{9}\right)+c$
• C
  $\frac{1}{3} \sin ^{-1}\left(\frac{9 x-8}{8}\right)+c$
• D
  $\frac{1}{2} \sin ^{-1}\left(\frac{9 x-8}{9}\right)+c$