A total charge Q is broken in two parts Q1 and Q2 and they are placed at a distance R from each other. The maximum force of repulsion between them will occur, when
A Q2=Q/R,Q1=Q−Q/R
B Q2=Q/4,Q1=Q−2Q/3
C Q2=Q/4,Q1=3Q/4
D Q1=Q/2,Q2=Q/2