# Data Structures | Heap | Question 3

A 3-ary max heap is like a binary max heap, but instead of 2 children, nodes have 3 children. A 3-ary heap can be represented by an array as follows: The root is stored in the first location, a[0], nodes in the next level, from left to right, is stored from a[1] to a[3]. The nodes from the second level of the tree from left to right are stored from a[4] location onward. An item x can be inserted into a 3-ary heap containing n items by placing x in the location a[n] and pushing it up the tree to satisfy the heap property.

Which one of the following is a valid sequence of elements in an array representing 3-ary max heap?**(A)** 1, 3, 5, 6, 8, 9**(B)** 9, 6, 3, 1, 8, 5**(C)** 9, 3, 6, 8, 5, 1**(D)** 9, 5, 6, 8, 3, 1**Answer:** **(D)****Explanation:** Following 3-ary Max Heap can be constructed from sequence given option (D)

9 / | \ / | \ 5 6 8 / | / | 3 1