Two identical balls A and B having velocities of $$0.5\frac{m}{s}$$ and $$-0.3\frac{m}{s}$$ respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be

A

$$0.5\frac{m}{s}$$ and $$-0.3\frac{m}{s}$$

B

$$-0.3\frac{m}{s}$$ and $$0.5\frac{m}{s}$$

C

$$0.3\frac{m}{s}$$ and $$0.5\frac{m}{s}$$

D

$$-0.5\frac{m}{s}$$ and $$0.3\frac{m}{s}$$