Queues

- \texttt{Insertion in a queue at FRONT} corresponds to \texttt{Enqueue} (A-II). This refers to adding an element at the front of the queue. - \texttt{Deletion in a queue at FRONT} corresponds to \texttt{Dequeue} (B-I), which removes an element from the front of the queue. - \texttt{Deletion operation} at the rear is associated with \texttt{Rear} (C-IV), as deletion can happen from the rear side in certain types of queue implementations, such as deque. - \texttt{Insertion operation} is associated with \texttt{Rear} (D-III), as this insertion typically occurs at the rear end of the queue in a standard queue structure. Therefore, the correct matching is A-II, B-I, C-IV, D-III.