Question

Gravitational potential energy of a system of particles as shown in the figure is

Options:
(a) `(Gm_1m_2)/r_1+(Gm_2m_3)/r_3+(Gm_1m_3)/r^3`
(b) `((-Gm_1m_2)/r_1)+((-Gm_2m_3)/r_2)+((-Gm_1m_3)/r^3)`
(c) `(-Gm_1m_2)/r_1-(Gm_2m_3)/r_2+(Gm_1m_3)/r^3`
(d) `(Gm_1m_2)/r_1+(Gm_2m_3)/r_2-(Gm_1m_3)/r^3`