A unit negative charge with mass M resides at the midpoint of the straight line of length 2a adjoining two fixed charges of magnitude `+Q` each if it is given n very small displacement `x(x lt lt a)` in a direction perpendicular to the straight line. It will

Options

A. come back to its original position and stay there
B. evecute oscillations with frequency `(1)/(2pi) sqrt((Q)/(2pi epsi_(0)Ma^(3)))`
C. fly to infinity
D. execute oscillation with frequency `(1)/(2pi) sqrt((Q)/(4pi epsi_(0) Ma^(2)))`