Find sum upto n terms: $\large\frac{3}{1^2.2^2}+\large\frac{5}{2^2.3^2}+\large\frac{7}{3^2.4^2}$+....

Question

$(a)\;\large\frac{n(n+2)}{(n+1)^2}\qquad(b)\;\large\frac{n^2(n+2)}{(n+1)}\qquad(c)\;\large\frac{n(n+2)^2}{n+1}\qquad(d)\;None$