Consider the following table :
$\begin{array}{|l|l|l|} \hline \textbf{A.} & \text{Activation record} & \textbf{p.} & \text{Linking loader} \\\hline \textbf{B.} & \text{Location counter} & \textbf{q.} & \text{Garbage collection} \\\hline \textbf{C.} & \text{Reference counts} & \textbf{r.} & \text{Subroutine call} \\\hline \textbf{D.} & \text{Address relocation} & \textbf{s.} & \text{Assembler} \\\hline \end{array}$
- $a-p, b-q, c-r, d-s$
- $a-q, b-r, c-s, d-p$
- $a-r, b-s, c-q, d-p$
- $a-r, b-s, c-p, d-q$