5 charges each of magnitude 10–5 C and mass 1 kg are placed (fixed) symmetrically about a movable central charge of magnitude 5 × 10–5 C and mass 0.5 kg as shown. The charge at P1 is removed. The acceleration of the central charge is-
[Given OP1 = OP2 = OP3 = OP4 = OP5 = 1 m; 1/4πε0 = 9 x 109 in SI units]
(A) 9 m *–2 upwards
(B) 4.5 m *–2 upwards
(C) 9 m *–2 downwards
(D) 4.5 m *–2 downwards
