$f(x) =e^x \sin x,$ then $f^{(6)} (x) $ is equal to :

Question

\[\begin {array} {1 1} (a)\;e^{6x} \sin 6x & \quad (b)\;-8e^{x} \cos x \\ (c)\;8e^{x} \sin x & \quad (d)\;8e^{x} \cos x \end {array}\]