Question $5$

Select all of the true statements from the following;

$($I$)$

$f(x)inO(g(x))Longrightarrowg(x)in(f(x))$

$f(x)subo(g(x))Longrightarrowf(x)inO(g(x))$

$f(x)inO(g(x))Longrightarrowf(x)sub(g(x))$

$f(x)ino(g(x))Longrightarrowf(x)inO(g(x))$

$f(x)in(g(x))Longrightarrowf(x)inO(g(x))$