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.