By knowing how circular motion works, we know that the force must point radially inwards, a diagram can be seen at the end of the answer.
In order to go from A to B, the object should travel along the circle shown.
So the acceleration must be applied in order to have circular motion, this means that the force (thus the acceleration) must be centripetal, so it must point radially inwards (perpendicular to the velocity of at point A, which is tangential to the circle)
The diagram is shown below, the force just must point radially inwards, and the magnitude of the force will depend on the radius of the circle and the mass of the object.
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