$\int 3^{3^{x}} 3^{x} d x=$ কত ?

$\frac{3^{x}}{\ln 3}+c$

$\frac{3^{3^{x}}}{\ln 3}+c$

$\frac{3^{x}}{(\ln 3)^{2}}+c$

$\frac{3^{3^{x}}}{(\ln 3)^{2}}+c$