Consider f$($n$)=5$n log n$,$ and g$($n$)=$ n log $5$n$,$ choose the most correct answer

Select one:

a$.$ non

b$.$ f $=$ O$($g$)$

c$.$ f $=$ O$($g$),$ f $=\backslash$Theta $($g$)$ and f $=($g$)$

d$.$ f $=$ O$($g$)$ and f $=\backslash$Theta $($g$)$