Two conducting spherical shells A and B of radii 4 cm and 6 cm respectively are placed with their centres 17 cm apart in air. Initially, sphere A was given a \(-20\) nC charge while sphere B was uncharged. The spheres are then connected by a long thin conducting wire and allowed to reach electrostatic equilibrium. Assuming no charge is lost to the surroundings, the final charge on sphere A and the ratio of magnitude of electric field intensity at the surface of sphere B to that of sphere A is given by:

1. A \(-12\text{nC}\ ;\ \dfrac{3}{2}\)
2. B \(-8\text{nC}\ ;\ \dfrac{3}{2}\)
3. C \(-8\text{nC}\ ;\ \dfrac{2}{3}\)
4. D \(-12\text{nC}\ ;\ \dfrac{2}{3}\)