In the figure shown, `m_(a)=m_(b)=1kg` block-`A` is neutral while block-`B` carries charge `-1c`. Sizes of `A` and `B` are negligible. Block-`B` is released from rest at a distance `1.8m` from `A`. Initially spring is neither compressed nor stretched.
Equilibrium position of the combined mass is at `X=`
A. `(-2)/(9)m`
B. `(-1)/(3)m`
C. `(-5)/(9)m`
D. `(-7)/(9)m`