Which of the following is not correct ?

Options

1. AHydrolysis of $\mathrm{NCl}_3$ gives $\mathrm{NH}_3$ and HOCl
2. B$\mathrm{NH}_3$ is less stable than $\mathrm{PH}_3$
3. C$\mathrm{NH}_3$ is a weak reducing reagent compared to $\mathrm{PH}_3$
4. DNitric oxide in solid state exhibits diamagnetic property