Solve this following


Mark $(\sqrt{)}$ against the correct answer in each of the following:

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

A. $\frac{x}{2} \sqrt{9-4 x^{2}}+\frac{9}{4} \sin ^{-1} \frac{2 x}{3}+C$

B. $x \sqrt{9-4 x^{2}}+\frac{9}{2} \sin ^{-1} \frac{2 x}{3}+C$

C. $\frac{x}{2} \sqrt{9-4 x^{2}}-\frac{9}{4} \sin ^{-1} \frac{2 x}{3}+C$

D. none of these


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