The electronic configurations of three elements, X, Y and Z, are shown here. X: $2,6$ Y: $2,8,1$ Z: $2,8,7$ Which formulae represent compounds that conduct electricity when molten?
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct