In the given figure, the numbers associated with the rectangle, triangle, and ellipse are $1,2$, and $3$, respectively. Which one among the given options is the most appropriate combination of $\mathrm{P}, \mathrm{Q}$, and $\mathrm{R}$?
- $P=6 ; Q=5 ; R=3$
- $P=5 ; Q=6 ; R=3$
- $P=3 ; Q=6 ; R=6$
- $P=5 ; Q=3 ; R=6$
