On straight rails a train is moving with constant velocity $$v$$. Suddenly a wagon breaks away from the train. The train continues with the same velocity while the wagon moves with constant retardation. After breaking away, the wagon covers distance $$d_1$$ before coming to rest and the train covers distance $$d_2$$ in the same duration. The ratio $$d_1/d_2$$ is

A

$$1/3$$

B

$$1/2$$

C

$$2/3$$

D

$$1$$