Let’s plug in p=3 and n=-2, then we get following values

$$ F=\frac{5}{3}=1.6,\ G=\frac{5}{2}=2.5,\ H=\frac{1}{5}=0.2,\ J=\frac{1}{3}=0.3333,\ K=\frac{1}{3}=0.3333 $$

So G has the greatest value and is the correct answer.