The graph between the displacement x and time t
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Q. The graph between the displacement x and time t for a particle moving in a straight line is shown in the figure. During the interval OA, AB, BC and CD, the acceleration of the particle is
OA AB BC CD
(A) + 0 + +
(B) – 0 + 0
(C) + 0 – +
(D) – 0 – 0