(d) the information is insufficient to decide the relation of xA with xB.
Explanation:
Magnitude of displacement depends up on initial velocity, time Duration and acceleration. In this case only time is known while magnitude of initial velocity and acceleration is unknown. These two displacements could only be comparable if directions of initial velocity and acceleration had been the same. Since in this case directions are opposite, their magnitudes need to be known, So there is not sufficient information.
