On dissolving moderate amount of sodium metal in liquid $NH_3$ at low temperature , Which of the following does not occur ?

Question

$\begin{array}{1 1} \text{Blue coloured solution is obtained} \\ \text{$Na^+$ cons are formed in the solution } \\\text{Liquid $NH_3$ solution becomes good conduction of electricity } \\ \text{ Liquid $NH_3$ Solution remains diamagnetic} \end{array}$