The interior angles of four triangles are given below:

$$\begin{array}{|l|l|}\hline \textbf{Triangle} & \textbf{Interior Angles} \\\hline \text{P} & 85^{\circ},50^{\circ},45^{\circ}\\\hline \text{Q} & 100^{\circ}, 55^{\circ},25^{\circ}\\\hline \text{R} & 100^{\circ},45^{\circ},35^{\circ} \\\hline \text{S} & 130^{\circ},30^{\circ},20^{\circ} \\\hline \end{array}$$

Which of the triangles are ill-conditioned and should be avoided in Triangulation surveys?

1. $\text{Both P and R}$
2. $\text{Both Q and R}$
3. $\text{Both P and S}$
4. $\text{Both Q and S}$