In the figure the variation of potential energy of a particle of mass `m = 2kg` is represented w.r.t. its x-coordinate. The particle moves under the effect of this conservative force along the x-axis.
`x = - 5m` and `x = 10 m` position of the particle are respectively of
A. neutral and stable equilibrium
B. neutral and unstable equilibrium
C. unstable and stable equilibrium
D. stable and unstable equilibrium