Two charges `+5mu C` and `+10 mu C` are placed `20 cm` apart. The net electric field at the mid-point between the two charges is
A. `4.5 xx 10^(6) NC^(-1)` directed towards `+ 5muC`
B. `4.5 xx 10^(6) NC^(-1)` directed towards `+ 10 muC`
C. `13.5 xx 10^(6) NC^(-1)` directed towards `+ 5 muC`
D. `13.5 xx 10^(6) NC^(-1)` directed towards `+ 10 muC`
