A charge Q is to be divided on two objects . What should be the values of the charges on the objects so that the force between the objects can be maximum

Question

$(a)\;\large\frac{Q}{4} , \large\frac{3Q}{4}\qquad(b)\;\large\frac{Q}{2} , \large\frac{Q}{2}\qquad(c)\;\large\frac{Q}{3} , \large\frac{2Q}{3}\qquad(d)\;None$