The diagram shows the heart and several major blood vessels. What could the blood pressures be (in $\text{kPa}$) for the vessels labelled on the diagram?
- AP = $1$, Q = $4$, R = $2$, S = $16$
- BP = $4$, Q = $16$, R = $2$, S = $1$
- CP = $16$, Q = $2$, R = $4$, S = $1$
- DP = $16$, Q = $4$, R = $1$, S = $2$