If $\overrightarrow{p} ,\overrightarrow{q}$ and $\overrightarrow{p}+\overrightarrow{q}$ are vectors of magnitude $\lambda$ than the magnitude of $|\overrightarrow{p}-\overrightarrow{q}|$ is

Question

$$\begin {array}{1 1}(1)2\lambda &(2)\sqrt{3}\lambda\\(3)\sqrt{2}\lambda&(4)1\end{array}$$