Match the pairs in the following questions:$$\begin{array}{ll|ll}\hline (a) & \text{Pointer data type} & (p) & \text{Type conversion} \\\hline (b) & \text{Activation record} & (q) & \text{Dynamic data structure} \\\hline (c) & \text{Repeat-until} & (r) & \text{Recursion} \\\hline (d) & \text{Coercion} & (s) & \text{ Nondeterministic loop } \\\hline \end{array}$$