Mark against the correct answer in each of the following:

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

$\int \frac{d x}{\{\sqrt{2 x+3}+\sqrt{2 x+3}\}}=?$

A. $\frac{1}{18}(2 x+3)^{3 / 2}+\frac{1}{18}(2 x-3)^{3 / 2}+C$

B. $\frac{1}{18}(2 \mathrm{x}+3)^{3 / 2}-\frac{1}{18}(2 \mathrm{x}-3)^{3 / 2}+\mathrm{C}$

C. $\frac{1}{12}(2 x+3)^{3 / 2}-\frac{1}{12}(2 x-3)^{3 / 2}+C$

D. none of these