Two identical conducting spheres $$P$$ and $$S$$ with charge $$Q$$ on each, repel each other with a force $$16 \text{ N}$$. A third identical uncharged conducting sphere $$R$$ is successively brought in contact with the two spheres. The new force of repulsion between $$P$$ and $$S$$ is :

A

$$1 \text{ N}$$

B

$$6 \text{ N}$$

C

$$12 \text{ N}$$

D

$$4 \text{ N}$$