The heap data structure is the most efficient way of implementing the ..................a)Priority queueb)None of the mentionedc)Front queued)Back queue

The heap data structure is the most efficient way of implementing the a) Priority queue.

Here's why:

1. A heap is a complete binary tree, which means it is perfectly balanced except for the last level. This property makes it suitable for implementing a priority queue.

2. In a priority queue, elements are added based on their priority and removed based on the highest priority. A heap data structure allows us to add and remove elements in O(log n) time, which is very efficient.

3. The heap property ensures that the parent node has a higher priority (in a max heap) or a lower priority (in a min heap) than its children. This makes it easy to extract the highest or lowest priority element from the heap.

4. Therefore, due to its properties and efficiency, a heap is the most suitable data structure for implementing a priority queue.