Match the information given in Group – I with those in Group – II.

$\begin{array}{llll} {} & \text{Group – I} & {} & \text{Group – II} \\ P & \text{Factor to decrease ultimate strength to} & 1 & \text{Upper bound on ultimate load} \\ {} & \text{design strength} \\ Q & \text{Factor to increase working load to} & 2 & \text{Lower bound on ultimate load} \\ {} & \text{ultimate load for design} \\ R & \text{Statical method of ultimate load} & 3 & \text{Material partial safety factor} \\ {} & \text{analysis} \\ S & \text{Kinematical mechanism method of} & 4 & \text{Load factor} \\ {} & \text{ultimate load analysis} \end{array}$

1. $P-1; \: Q-2; \: R – 3;\: S – 4$
2. $P-2; \: Q-1; \: R – 4;\: S – 3$
3. $P-3; \: Q-4; \: R – 2;\: S – 1$
4. $P-4; \: Q-3; \: R – 2;\: S – 1$